Cursed Ronin

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)
: Cursed Ronin gets +1/+1 until end of turn.

Sosuke, Son of Seshiro

Other Snake creatures you control get +1/+0.
Whenever a Warrior you control deals combat damage to a creature, destroy that creature at end of combat.

Arcbound Ravager

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.
Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Healer’s Headdress

Equipped creature gets +0/+2 and has “: Prevent the next 1 damage that would be dealt to any target this turn.”
: Attach Healer’s Headdress to target creature you control.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Qumulox

Affinity for artifacts (This spell costs less to cast for each artifact you control.)
Flying

Endless Whispers

Each creature has “When this creature dies, choose target opponent. That player puts this card from its owner’s graveyard onto the battlefield under their control at the beginning of the next end step.”

Blind Creeper

Whenever a player casts a spell, Blind Creeper gets -1/-1 until end of turn.

Battered Golem

Battered Golem doesn’t untap during your untap step.
Whenever an artifact enters the battlefield, you may untap Battered Golem.

Tyrranax

: Tyrranax gets -1/+1 until end of turn.

Bringer of the Black Dawn

You may pay rather than pay this spell’s mana cost.
Trample
At the beginning of your upkeep, you may pay 2 life. If you do, search your library for a card, then shuffle your library and put that card on top of it.

Vanquish

Destroy target blocking creature.

Darksteel Colossus

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

Arcbound Ravager

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.
Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Memnarch

: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.)
: Gain control of target artifact. (This effect lasts indefinitely.)

Arcbound Overseer

At the beginning of your upkeep, put a +1/+1 counter on each creature with modular you control.
Modular 6 (This creature enters the battlefield with six +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Soldier Replica

, Sacrifice Soldier Replica: It deals 3 damage to target attacking or blocking creature.

Elf Replica

, Sacrifice Elf Replica: Destroy target enchantment.

Mourner’s Shield

Imprint — When Mourner’s Shield enters the battlefield, you may exile target card from a graveyard.
, : Prevent all damage that would be dealt this turn by a source of your choice that shares a color with the exiled card.

Nim Replica

, Sacrifice Nim Replica: Target creature gets -1/-1 until end of turn.

Leveler

When Leveler enters the battlefield, exile all cards from your library.

Wizard Replica

Flying
, Sacrifice Wizard Replica: Counter target spell unless its controller pays .