TFT Items
The item system carries across sets: 61 components combine into 40 finished items. Set 17 adds 352 of its own.
Components

Aegis of Dawn
Every 2.5 seconds, steal 3 Armor from enemies within 1-hex and heal ?% of the holder's Armor. If Aegis of Dusk is also equipped, trigger this item's effect every 1.25 seconds instead. Healing increases based on Stage.

Aegis of Dusk
Every 2.5 seconds, steal 3 Magic Resist from enemies within 1 hex and deal ?% of the holder's Magic Resist as magic damage. If Aegis of Dawn is also equipped, trigger this item's effect every 1.25 seconds instead. Damage increases based on Stage.

Aegis of the Legion
Combat start: Grant 25% Attack Speed and 15 Armor and Magic Resist to the holder, adjacent allies in the same row, and all allies behind them for 12 seconds. [Support item]

B.F. Sword
+10% Attack Damage

Banshee's Veil
Combat start: Grant the holder and allies within 1 hexes in the same row immunity to crowd control and 25% Attack Speed for 18 seconds. [Support item] [Unique - only 1 per champion]

Blighting Jewel
Dealing magic damage reduces the target's Magic Resist by 6. If their Magic Resist is 0, grant the holder 2 Mana instead. Ability damage can only trigger on each enemy once every 0.5 seconds.

Cappa Juice
The holder dons a Hat on each takedown. The holder gains 1% Attack Damage and Ability Power per Hat. On death lose 20% of all Hats. (Hats: ?)

Chain Vest
+20 Armor

Chalice of Power
Combat start: Grant 25 Ability Power and 10 Mana to the holder and allies within 2 hexes in the same row. [Support item]

Corrupt Vampiric Scepter
Attacks deal an additional 60% Attack Damage as physical damage and heal the holder for the damage dealt. The holder cannot cast their Ability or gain Mana.

Dawncore
Reduce the holder's max Mana by 10. Subsequent spellcasts reduce max Mana by 10%, to a minimum of 10.

Eternal Pact
Combat start: Form a pact with the highest Health allied champion, if they die, gain 10 Mana regen and 40% Ability Power. When the ally uses their ability, gain 15 Mana. Every 6 seconds, shield your ally for 200% of the holder's Ability Power.

Fishbones
The holder's attacks target random enemies.

Flickerblades
Attacks grant 5% stacking Attack Speed. Every 3 attacks also grant 2% Attack Damage and 2% Ability Power.

Forbidden Idol
Shields have 50% of their value converted to max Health instead.

Frying Pan
...why else would it be here?

Giant's Belt
+150 Health

Hellfire Hatchet
Attacks deal 3% of the holder's max Health as bonus physical damage. For every 1% missing Health, gain 1% Attack Speed.

Horizon Focus
Stunning an enemy causes lightning to strike them, dealing 30% of their max Health as magic damage.

Innervating Locket
The holder gains 1% of their total Mana whenever they're hit by an attack. Each cast restores 20% of the holder's max Health over 3 seconds.

Knight's Vow
Combat start: Grant 200 Health and 15% Omnivamp to the holder and allies within 1 hex in the same row. [Support item]

Lesser Mirrored Persona
Share 15% of the holder's bonus Attack Damage, Ability Power, Attack Speed, Armor, Magic Resist, and Health with other Mirrored Persona holders. Can't be Reforged Unique: one per champion

Lich Bane
The holder's first attack after each Ability cast deals ? bonus magic damage. Damage increases based on Stage.

Lightshield Crest
Every 3 seconds, Shields the lowest percent Health ally for 70% of the holder's combined Armor and Magic Resist for 5 seconds. On death grants this shield to all allies.

Locket of the Iron Solari
Combat start: The holder and allies within 2 hexes in the same row gain a 250 Shield, 20 Armor, and 20 Magic Resist for 20 seconds. [Support item]

Luden's Tempest
100% of overkill damage plus 100 is dealt as magic damage to the two enemies nearest to the target.

Mending Echoes
Increase healing on the holder by 25%. When the holder gives or receives a heal, grant 40% of the heals value to the lowest health ally as well.

Mirrored Persona
Every 6 player combats gain a lesser copy of Mirrored Persona (?/6). Share 15% of the holder's bonus Attack Damage, Ability Power, Attack Speed, Armor, Magic Resist, and Health with other Mirrored Persona holders. Can't be Reforged, Lesser copies do not produce copies. Unique: one per champion

Mittens
Shrinks the holder, granting them increased movement speed and immunity to Slow, Burn, and Wound.

Moonstone Renewer
Every 4 seconds, grant a 55-325 Shield (based on Stage) to the 2 lowest percent health allies for 4 seconds. [Support item]

Needlessly Large Rod
+10 Ability Power

Negatron Cloak
+20 Magic Resist

Prowler's Claw
After killing a target, shed negative effects and dash to the farthest target within 4 hexes. The next 2 critical attacks deal 50% bonus Critical Strike Damage.

Rapid Firecannon
Gain +1 Attack Range, increased by 1 whenever the holder kills an enemy.

Recurve Bow
+10% Attack Speed

Seeker's Armguard
Takedowns increase the holder's Armor, Magic Resist, and Ability Power by 20.

Sentinel Swarm
Every 3 seconds, summon a powerful Sentinel equipped with Completed, Artifact, and Radiant items.

Shadow Puppet
Spawn a clone that copies the holder's items. The clone has 60% max Health and deals 40% damage. [Unique - only 1 per champion]

Shroud of Stillness
Combat start: Shoot a beam that 30% Mana Reaves enemies. Your team gains 60 Health. [Support item] [Unique - only 1 per champion] Mana Reave: increase maximum Mana until the next cast ?

Silvermere Dawn
Grants immunity to Stuns and the holder's attacks Stun the target for 0.8 seconds. The holder's Attack Speed is locked at 0.5.

Sparring Gloves
+20 Critical Strike Chance

Spatula
It must do something...

Spectral Cutlass
Combat start: Teleport the holder to the mirrored hex on the enemy's side of the board. After 8 seconds, the holder returns to their original location.

Spite
Combat start: The holder and all adjacent allies gain 15 Attack Damage and 20 Ability Power. When the holder dies, Stun all enemies within 2-hexes for 2 seconds. [Support item]

Statikk Shiv
Every 3rd attack deals 30 + 50% of the holder's Ability Power as additional magic damage to 4 enemies.

Suspicious Trench Coat
Once per combat at 60% Health, the holder splits into 3 copies of themself each with 33% of their max Health. [Unique - only 1 per champion]

Talisman Of Ascension
After 22 seconds gain 100% max Health and 120% Damage Amp for the rest of combat.

Tear of the Goddess
+1 Mana Regen

The Eternal Flame
While the holder is alive, all enemies are 33% Wounded and all allies gain 8% Damage Amp. This effect refreshes every 5 seconds. [Support item] Wound: Reduces healing received

The Indomitable
The holder's Move Speed is drastically reduced. Gain 15% max Health, stun immunity, and pull the current target into melee range.

Thief's Gloves
Each round: Equip 2 random items. [Consumes 3 item slots.] ?

Thief's Gloves
Each round: Equip 2 random items. [Consumes 3 item slots.] ?

Titanic Hydra
Attacks deal 4% of the holder's max Health plus 6% of their Attack Damage as bonus physical damage to the target and adjacent enemies.

Unending Despair
Whenever a Shield on the holder breaks, 150% of that Shield's initial value is dealt to the nearest enemy as magic damage.

Unusable Slot
This slot can't hold an item.

Virtue of the Martyr
Every 5 seconds, heal your team for 7% of their max Health. When the holder dies, the healing increases to 14% max Health for 2 extra heals. Healing: ? [Support item]

Void Gauntlet
Combat start: Store 30% max Health and 2.5% more every second. On death, unleash the stored Health as magic damage split between enemies within 4-hexes. [Unique - only 1 per champion]

Wit's End
Attacks deal ? bonus magic damage. Heals the holder for 30% of all magic damage dealt. Damage increases based on Stage.

Zeke's Herald
Combat start: Grant 30% Attack Speed to the holder and allies within 2 hexes in the same row. [Support item]

Zephyr
Combat start: Summon a whirlwind on the opposite side of the arena that removes the closest enemy from combat for 5 seconds. Your team gains 2% Attack Speed. [Support item] [Ignores crowd control immunity.] [Unique - only 1 per champion] ?

Zz'Rot Portal
Combat start: Taunt. On death, a Voidspawn arises, Taunting nearby enemies. The Voidspawn has massively reduced effectiveness when created by a summoned unit. Taunt: enemies that are able and in range must attack the taunter
Combined items

Adaptive Helm
Gain an additional 15% Mana from all sources. The holder gains an additional bonus based on their Role: Tanks and Fighters: Gain 30 Armor and Magic Resistance. Other Roles: Gain 10% Attack Damage and Ability Power.

Archangel's Staff
Combat start: Gain 20% Ability Power every 5 seconds in combat.

Bloodthirster
Once per combat at 40% Health, gain a 25% max Health Shield that lasts up to 5 seconds.

Blue Buff
Gain 10% additional Attack Damage and Ability Power from all sources.

Blue Buff
Abilities cost 10 less Mana to cast. If the holder gets at least 1 takedown within 3 seconds of casting, gain 10 Mana. [Unique - only 1 per champion]

Bramble Vest
Gain 6% max health. Take 5% reduced damage from attacks. When struck by any attack, deal 100 magic damage to all adjacent enemies. Cooldown: 2 seconds

Crownguard
Combat Start: Gain a 25% max Health Shield for 8 seconds. When the Shield expires, gain 25% Ability Power.

Deathblade
Perfect peace and calm for the holder - and all who face it. ?

Dragon's Claw
Gain 6% max health. Every 2 seconds, heal 2.5% max Health.

Edge of Night
At 60% Health, briefly become untargetable, shed negative effects, and heal 20% missing health.

Evenshroud
30% Sunder enemies within 2 hexes. Gain 15 Armor and Magic Resist for the first 15 seconds of combat. Sunder: Reduce Armor

Gargoyle Stoneplate
Gain 10 Armor and 10 Magic Resist for each enemy targeting the holder.

Giant Slayer
Gain 15% additional Damage Amp against Tanks.

Guinsoo's Rageblade
Gain 7% stacking Attack Speed every second.

Hand Of Justice
Gain 2 effects:15% Attack Damage and 15% Ability Power.12% Omnivamp. While above 50% health, double the Attack Damage and Ability Power. While below 50% Health, double the Omnivamp.

Hextech Gunblade
Heal the lowest percent Health ally for 20% of damage dealt. Ally Healing: ?

Infinity Edge
Gain Precision.

Ionic Spark
30% Shred enemies within 2 hexes. When enemies cast an Ability, deal magic damage equal to 150% of the Mana spent Shred: Reduce Magic Resist

Jeweled Gauntlet
Gain Precision.

Kraken's Fury
Attacks grant 3.5% stacking Attack Damage, up to 15 attacks. After 15 attacks, gain 15% Attack Speed.

Last Whisper
Damage from attacks and Abilities 30% Sunder the target for 3 seconds. This effect does not stack. Sunder: Reduce Armor

Morellonomicon
Attacks and Abilities deal 1% Burn and 33% Wound to enemies for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received

Nashor's Tooth
Attacks grant 2 bonus Mana, increased to 4 if they critically strike.

Protector's Vow
Combat Start: Gain 20 Mana. At 40% Health, gain 15 Mana and a Shield equal to 20% max Health.

Quicksilver
Combat Start: Gain immunity to crowd control for 18 seconds. Gain 3% stacking Attack Speed every second.

Rabadon's Deathcap
This humble hat can help you make, or unmake, the world itself. ?

Red Buff
Attacks and Abilities 1% Burn and 33% Wound enemies for 5 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received

Spear of Shojin
Attacks grant 5 bonus Mana.

Spirit Visage
Regenerate 2% of missing Health each second.

Steadfast Heart
Gain 5% Durability. While above 50% Health, instead gain 15% Durability. ?

Sterak's Gage
At 60% Health, gain a Shield equal to 40% of the wearer's maximum Health that rapidly decays over 4 seconds.

Striker's Flail
Critical Strikes grant 5% Damage Amp for 5 seconds, stacking up to 4 times.

Sunfire Cape
Gain 8% max Health. Every 2 seconds, deal 1% Burn and 33% Wound to an enemy within 2 hexes for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received

Tactician's Cape
Your team gains +1 max team size. 10% chance to drop 1 gold after 10 seconds of combat. "...and a bit of Luck."

Tactician's Crown
Your team gains +1 max team size. 10% chance to drop 1 gold when you win combat. "...the Heart of a hero..."

Tactician's Shield
Your team gains +1 max team size. 10% chance to drop 1 gold when the holder dies. "Imbued with a Philosopher's wisdom..."

Thief's Gloves
Each round: Equip 2 random items. [Consumes 3 item slots.] ?

Titan's Resolve
Gain 2% Attack Damage and 2% Ability Power when attacking or taking damage, stacking up to 25 times. At full stacks, gain 10% Damage Amp and gain immunity to crowd control.

Void Staff
Damage from attacks and Abilities 30% Shred the target for 5 seconds. This effect does not stack. Shred: Reduce Magic Resist

Warmog's Armor
Gain 18% max Health.
Set 17 items
Space Gods adds 352 items of its own, from artifacts and radiant upgrades to the ones built around its own mechanics.
All 352 Set 17 items