Dian Keto, Cure Master

Lifelink
At the beginning of the end step of your turn,
each player reveals and exiles the top card of their library. You may play any of them with CMC less
than or equal to the amount of life you gained
this turn without paying their mana costs. If a
card exiled this way is not played, return it to the bottom of it's owner's library. If your life total is
15 points higher than your starting life total,
replace "your turn" with "each players turn".