Vassafina

Shroud, trample

{x}{2}{u}: Phase out Vassafina with X time
counters on it, and exile X targets divided among
any number of nonland permanents you control
and any number of top cards from any player's
library. Those cards remain exiled for as long as
Vassafina is phased out. When this creature phases
in, return all cards exiled with Vassafina to the
battlefield under your control.