Lifelink Whenever an Aura you control becomes attached to a nonland permanent an opponent controls with mana value less than or equal to that Aura's mana value, gain control of that permanent for as long as that Aura is attached to it.

Each creature that's enchanted by an Aura you control can't attack you or planeswalkers you control. At the beginning of your end step, each opponent loses X life and you gain X life, where X is the number of Auras you control.