Korhax, Tremor Incarnate

Eminence — If Korhax, Tremor Incarnate is in
the command zone or on the battlefield, each
Wurm card in your hand or in exile has delve
and desertcycling {2}. Whenever a Wurm card is
exiled to pay for a delve cost, put a tremor
counter on it.
Reach, trample
Once during each of your turns, you may cast a
spell from among cards you own in exile with
tremor counters on them.