Terrorblade transforms into a powerful demon, gaining a ranged attack of 4 cells as well as [50/100/200] bonus to damage and [50/75/100] to attack speed. Terrorblade also exchanges health values with another ally when this ability starts.
Notes:
Terrorblade exchanges his health percentages with a friendly unit that has the highest health percentage at cast time.
If there is no friendly unit with a health percentage higher than his own, Terrorblade does not exchange health when casting Metamorphosis.