Devoted Cloner

Legion {u} (At the beginning of your upkeep, you may
pay {u}. If you do, create a token that's a copy of this creature.)
Whenever a creature enters the battlefield, if it's
name is Devoted Cloner, you may pay {u}. If you
do, create a token that's a copy of Devoted Cloner.
At the beginning of your upkeep, if you control
10 or more creatures named Devoted Cloner,
you win the game.