Matthew, Rotbound Regrower

Deathtouch

The first Fungus spells you cast each turn has
Grave Cascade (Shuffle your graveyard and place it facedown. Exile cards from the top of your graveyard
until you exile a nonland card with mana value less
than X where X is that spells mana cost. Cast it
without paying its mana cost or put it into your hand.
Put cards exiled this way back into your graveyard
and return your graveyard face up.)