Whenever a creature enters the battlefield under your control, you may destroy target artifact or enchantment.

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature.

{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Fungal Behemoth's power and toughness are each equal to the number of +1/+1 counters on creatures you control.

Suspend X--{X}{G}{G}. X can't be 0. (Rather than cast this card from your hand, you may pay {X}{G}{G} and exile it with X time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)

Whenever a time counter is removed from Fungal Behemoth while it's exiled, you may put a +1/+1 counter on target creature.

If Leyline of the Meek is in your opening hand, you may begin the game with it on the battlefield.

Creature tokens get +1/+1.

Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on Mold Adder.

Destroy target creature or enchantment.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Create three 1/1 green Saproling creature tokens.

At the beginning of your upkeep, put a spore counter on Spore Flower.

Remove three spore counters from Spore Flower: Prevent all combat damage that would be dealt this turn.

Target creature gets -1/-1 until end of turn.

Morbid -- That creature gets -13/-13 until end of turn instead if a creature died this turn.

Undergrowth Scavenger enters the battlefield with a number of +1/+1 counters on it equal to the number of creature cards in all graveyards.