Stats

Armor, magic resist, mana and attack speed are the same at every star level.

Shyvana

1 star: Transform into a dragon for the rest of combat and replace this ability with Flame Breath. Become briefly untargetable and dive-bomb into the largest group of enemies, dealing 80 magic damage in a 3-hex circle and Stunning for 1.25 seconds. After landing, cast Flame Breath immediately. Flame Breath: Breathe fire in a cone, dealing up to 700 magic damage to enemies hit. While breathing fire, is always enraged.
2 star: Transform into a dragon for the rest of combat and replace this ability with Flame Breath. Become briefly untargetable and dive-bomb into the largest group of enemies, dealing 150 magic damage in a 3-hex circle and Stunning for 1.25 seconds. After landing, cast Flame Breath immediately. Flame Breath: Breathe fire in a cone, dealing up to 1200 magic damage to enemies hit. While breathing fire, is always enraged.
3 star: Transform into a dragon for the rest of combat and replace this ability with Flame Breath. Become briefly untargetable and dive-bomb into the largest group of enemies, dealing 1500 magic damage in a 3-hex circle and Stunning for 10 seconds. After landing, cast Flame Breath immediately. Flame Breath: Breathe fire in a cone, dealing up to 20000 magic damage to enemies hit. While breathing fire, is always enraged.