Rat Architect

Whenever a rat enters the battlefield create a stone artifact token. Whenever an artifact enters the battlefield put a +1/+1 counter on Rat Architect. When Rat Architects power is over 5 then search your library for a artifact or rat and put it onto the battlefield. If Rat Architects power is over 15 you win the game.
Sacrifice 5 stones: Put a +1/+1 counter on each creature you control. Search your library for a land and put it on the battlefield tapped.