Zerrest, Conciliator's Garden

Zerrest, Conciliator's Garden enters the battlefield tapped unless you control a white, black, and green creature.
{t}: {w}, {b}, or {g}.
{t}, {w}{b}{g}: You may look at the top X cards of your library, where X is the number of Advisor creatures on the battlefield. Put one of those cards into your hand and the rest at the bottom of your library in any order.