Lo, Energy of the Tiger

+4: At the beginning of your next turn's first main phase, add three mana of any single color to your mana pool. Each opponent gains 3 life.
-X: Lo, Energy of the Tiger deals X damage to target creature an opponent controls. You gain X life and draw X cards (X cannot exceed 3).
-5: Lo becomes a 4/4 human monk with flying and indestructible that's also unblockable. He's still a planeswalker.