All That Became One

At the beginning of your end step,
reveal the top card of your library
until you reveal a Praetor Creature card.
All That Became One becomes a copy of that
card until the beginning of your next upkeep,
then put all revealed cards at the bottom
of the library in a random order.
Complited- If you control a Praetor of each color
other then All That Became One,
you win the game.