axcrill, titanic prowler

whenever you cast an instant or sorcery, you may
exile with a power counter it instead of putting it
into your graveyard.
axcrill, titanic prowler gets +1/+1 for each card
you own that's exiled with a power counter on it
{u}{g}: you may cast target instant or sorcery spell
that you own from exile with a power counter on
it
(you still pay its costs, timing rules still apply)