Haste

Whenever Berstine, Human Form attacks, if its the first time he has attacked this turn, there is an dditonal combat step after this one. Untap your creatures.

Whenever Berstine, Human Form deals combat damage to a player, you may pay {3}{R/W}. If you do, transform Berstine, Human Form.

Flying, lifelink

Whenever Berstine, Fire or Rebelion attacks, any player other than you may pay {3}{2/R}. If any player does, there is an dditonal combat step after this one. Untap your creatures.

{3}{W}{R}: Berstine, Fire or Rebelion deals 5 damage to any target.