Xerneas, Life Granter

You gain 3 life for each 2 life you paid to cast Xerneas.
Reach, Indestructible, Hexproof, protection from infection and wither.
When Xerneas dies, put a "life" counter on each creature you control.
At the beginning of your upkeep, if you control 30 or more creatures with "life" counters on them, you win the game.