Contagion Engine

When this artifact enters, put a -1/-1 counter on each creature target player controls.
{4}, {T}: Proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

Leaden Myr

Island

Skinrender

When this creature enters, put three -1/-1 counters on target creature.

Moriok Reaver

Trigon of Thought

This artifact enters with three charge counters on it.
{U}{U}, {T}: Put a charge counter on this artifact.
{2}, {T}, Remove a charge counter from this artifact: Draw a card.

Sky-Eel School

Flying
When this creature enters, draw a card, then discard a card.

Thrummingbird

Flying
Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Twisted Image

Switch target creature's power and toughness until end of turn.
Draw a card.

Doom Blade

Culling Dais

{T}, Sacrifice a creature: Put a charge counter on this artifact.
{1}, Sacrifice this artifact: Draw a card for each charge counter on this artifact.

Steady Progress

Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Draw a card.

Swamp

Carnifex Demon

Flying
This creature enters with two -1/-1 counters on it.
{B}, Remove a -1/-1 counter from this creature: Put a -1/-1 counter on each other creature.

Darkslick Drake

Flying
When this creature dies, draw a card.

Contagion Clasp

When this artifact enters, 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.)

Silver Myr

Harbor Serpent

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
This creature can't attack unless there are five or more Islands on the battlefield.

Instill Infection

Put a -1/-1 counter on target creature.
Draw a card.

Fume Spitter

Sacrifice this creature: Put a -1/-1 counter on target creature.

Sorcerer's Strongbox

{2}, {T}: Flip a coin. If you win the flip, sacrifice this artifact and draw three cards.

Trigon of Corruption

This artifact enters with three charge counters on it.
{B}{B}, {T}: Put a charge counter on this artifact.
{2}, {T}, Remove a charge counter from this artifact: Put a -1/-1 counter on target creature.

Throne of Geth

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

Maritime Guard

Necrogen Censer

This artifact enters with two charge counters on it.
{T}, Remove a charge counter from this artifact: Target player loses 2 life.