Zombie Infestation

Discard a card: This creature gains flying until end of turn. Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and can't block.

When this creature enters, sacrifice it unless you discard a creature card.

When this creature enters, exile another target creature. When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.

B: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.) Swampcycling 2 (2, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

Flying Whenever Crosis deals combat damage to a player, you may pay 2B. If you do, choose a color, then that player reveals their hand and discards all cards of that color.

If there are ten or more creature cards total in all graveyards, this spell costs 6 less to cast. Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) T: Destroy target creature. It can't be regenerated.

When this creature enters, you may destroy up to three target noncreature permanents. For each permanent put into a graveyard this way, its controller creates a 3/3 green Elephant creature token.

At the beginning of each upkeep, create a 1/1 green Saproling creature token.