Embelished Cantor

Flash, ward 1
When Ashtin, Embelished Cantor enters the
battlefield, exile {x} number of attacking creatures
and put a scroll counter counter on each of those
creatures exiled this way.
{w/u},{t}: Choose a player at random, they may cast a
spell exiled with a scroll counter as though it had
flash, without paying it's mana cost.
{2}{w/u},{ut}: Return Ashtin, Embelished Cantor to
their owner's hand.