Ancient Kitsune's Blessing

Enchant creature
Enchanted creature gets +2/+2 and has hexproof.
Write out your current life total.
At the beginning of your upkeep, put a life counter on enchanted creature and you gain one life for each life counter on the enchanted creature.
At the beginning of your end step, if you have gained more than 100 life from your beginning life total, you win the game.