Rika, Indomitable Player

Whenever a creature you control enters the battlefield, it gains +2/+2 and lifelink until Rika, Indomitable Player leaves the battlefield.
Whenever a creature you control taps, gain {c}. This mana can only be used to activate abilities.

{6}: Search your library for a creature card, put it onto the battlefield, then shuffle your library.

At the beginning of your end step, if you control 10 or more non-token creatures and have 10 or more life above your starting life total, you win the game.