Infect
: Regenerate this creature.

Attacking Pests you control get +1/+0 and have menace.
Whenever a nontoken creature you control dies, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."

Defender
, : Each opponent loses X life, where X is the number of creatures with defender you control.

Put four -1/-1 counters on target creature.

Equipped creature gets +1/+0 and has wither.
Equip

Deathtouch
Whenever this creature enters or attacks, mill two cards, then incubate X, where X is the number of creature cards in your graveyard.

Protection from green
Creatures your opponents control can't have +1/+1 counters put on them.

Toxic 1
When this creature dies, proliferate.

When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion to black.

Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn.

Infect
This creature can't be blocked.

Flying
: This creature gains haste until end of turn.

Whenever this creature enters or attacks, you may blight 2. If you do, you draw a card and lose 1 life.

Enchant land
When this Aura enters, incubate 2.
Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color.

: Add .
, , Sacrifice this land: Draw two cards.

: Add .
, , Sacrifice this land: Target opponent sacrifices a creature of their choice.

: Add .
, , Sacrifice this land: It deals 2 damage to any target.

When this enchantment enters, creature cards in your graveyard perpetually get +1/+1.
Blight X, Return this enchantment to its owner's hand: Return target creature card with mana value X or less from your graveyard to the battlefield. X can't be greater than the greatest toughness among creatures you control. Activate only as a sorcery.

, Sacrifice a Swamp: Target creature gets +1/+1 until end of turn.
, Sacrifice a creature: Target creature gets +2/+2 until end of turn.

: Add .
, , Sacrifice this land: You gain 2 life for each creature you control.

: Add .
, , Sacrifice this land: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Blightning deals 3 damage to target player or planeswalker. That player or that planeswalker's controller discards two cards.

: Transform this creature. Activate only as a sorcery. ( can be paid with either or 2 life.)

, Pay 1 life: Add .

When this creature transforms into Blightsower Thallid or dies, create a 1/1 green Phyrexian Saproling creature token.

: Target player loses 1 life.
, : Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

Trample, infect, indestructible
If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.

: Add .

Reach
Infect

Flying, deathtouch
Whenever you cast your first spell during each opponent's turn, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it.