{1}{G}, Exile a creature card from your graveyard: Create a 1/1 green Saproling creature token. Sacrifice two Saprolings: You gain 2 life and draw a card.
Thallids nurture saprolings, entertain them, and eat them.
[+1]: Reveal the top five cards of your library. Put all creature cards revealed this way into your hand and the rest on the bottom of your library in any order. [–3]: You may put a green creature card from your hand onto the battlefield. [–7]: You get an emblem with "Whenever you cast a creature spell, you may search your library for a creature card, put it onto the battlefield, then shuffle."
Target creature gets +2/+2 until end of turn. Landfall — If you had a land enter the battlefield under your control this turn, that creature gets +4/+4 until end of turn instead.
As an additional cost to cast this spell, sacrifice a land. Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.
The Roil redraws the world as it passes, leaving only the hedrons unchanged.