Each round, all other Heroes are Attacked for one fifth of Grim Reaper's Power Strength (rounded down).
Hypnotic Sheep
Evolution
Whenever you take more damage than Evolution's Power Strength in a single round, choose a random Power from the online archives, then double Evolution's Power Strength.
Ultimatum
The Ascendant
Add 30 to your Defence every round. At the start of the third round, you win.
