When you have less then 20% of your life left, you may kill yourself. Once you do this, you give your teammate all the life that you had left and deal the same amount as damage to an enemy.
Kill yourself. Everyone on your side except dies, but the opponents turn into one and all their HP is combined into a huge monster. The monster loses 5% of its HP every turn for 99 turns.
Risk Taker/Drug Addict (CD: 45 Focus: 100 HP Drain: 90% all allies, Tier: lvl 30)
Drain 90% HP of all allies to build a protective barrier which lasts 20 turns. This barrier can take all your allies levels combined x100 damage. Your strength is increased by 600% while those turns last. There is a 10% chance you might die in that time though, and 4% of one one of your allies dying.
Why the Hell Did You do That? ! Level 20 Passive Effect
Every turn you lose 10% of your HP while your allies lose 5%. The enemies lose 5% off everyone. Your strength and piercing goes up 10% while your enemies (all stats) go up 10%.