Furnace Scamp

Whenever Furnace Scamp deals combat damage to a player, you may sacrifice it. If you do, Furnace Scamp deals 3 damage to that player.

Toxic Nim

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
: Regenerate Toxic Nim.

Caress of Phyrexia

Target player draws three cards, loses 3 life, and gets three poison counters.

Mirran Mettle

Target creature gets +2/+2 until end of turn.
Metalcraft — That creature gets +4/+4 until end of turn instead if you control three or more artifacts.

Distant Memories

Search your library for a card, exile it, then shuffle your library. Any opponent may have you put that card into your hand. If no player does, you draw three cards.

Spiraling Duelist

Metalcraft — Spiraling Duelist has double strike as long as you control three or more artifacts.

Deathbringer Thoctar

Whenever another creature dies, you may put a +1/+1 counter on Deathbringer Thoctar.
Remove a +1/+1 counter from Deathbringer Thoctar: It deals 1 damage to any target.

Malfegor

Flying
When Malfegor enters the battlefield, discard your hand. Each opponent sacrifices a creature for each card discarded this way.

Vedalken Certarch

Metalcraft — : Tap target artifact, creature, or land. Activate this ability only if you control three or more artifacts.

Ezuri, Renegade Leader

: Regenerate another target Elf.
: Elf creatures you control get +3/+3 and gain trample until end of turn.

Nim Deathmantle

Equipped creature gets +2/+2, has intimidate, and is a black Zombie. (A creature with intimidate can’t be blocked except by artifact creatures and/or creatures that share a color with it.)
Whenever a nontoken creature is put into your graveyard from the battlefield, you may pay . If you do, return that card to the battlefield and attach Nim Deathmantle to it.
Equip

Kor Aeronaut

Kicker (You may pay an additional as you cast this spell.)
Flying
When Kor Aeronaut enters the battlefield, if it was kicked, target creature gains flying until end of turn.

Aether Vial

At the beginning of your upkeep, you may put a charge counter on Aether Vial.
: You may put a creature card with converted mana cost equal to the number of charge counters on Aether Vial from your hand onto the battlefield.

Stormtide Leviathan

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can’t attack.

Acidic Slime

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Acidic Slime enters the battlefield, destroy target artifact, enchantment, or land.

Elvish Archdruid

Other Elf creatures you control get +1/+1.
: Add for each Elf you control.

Infest

All creatures get -2/-2 until end of turn.