Accelerated Existence

Convoke
You cannot spend mana to cast this spell.
At the beginning of your upkeep, sacrifice
Accelerated Existence. If you do, exile the
top card of your library. If it is a creature card
with converted mana cost 3 or less, you may
play it without paying its mana cost and as
though it had flash.
You may cast Accelerated Existence from your graveyard.