Build-around rare that sacrifices artifacts and/or has an ability that triggers off of instants/sorceries.
Let's start the voting!
Eater of Histories
Creature - Elemental
Sacrifice an artifact: put a +1/+1 counter on Eater of Histories. If that artifact was a relic, Eater of Histories gains your choice of trample, first strike, or haste. If Eater of Histories already has trample, first strike, and haste it gains your choice of double strike, indestructible, or deathtouch instead.
Anjomeddon's minions stalk across Illpyre, hunting down and consuming anything that suggests the Starstill hadn't always been.3/3
Viashino Tinkerer |
Creature - Viashino Artificer (R)
, Sacrifice an artifact: Search your library for an artifact card with converted mana cost equal to the sacrifice artifacts converted mana cost and put it onto the battlefield. Then shuffle your library.
"That thing is junk. This thing however..."2/2
Viashino Blitzrunner –
Creature – Viashino Berserker (R)Haste
Sacrifice an artifact: Instant and sorcery spells you cast cost
less to cast this turn.
2/2
Vixixil, Sharpnel Smith -
Legendary Creature - Viashino Artificer
, Exile three artifact cards from your graveyard: Put a relic artifact token onto the battlefield.
,
, Sacrifice an artifact: ~ deals 3 damage to target creature or player.
3/2
Viashino Scavenger Creature - Viashino WarriorAs an additional cost to play Viashino Scavenger you may sacrifice any number of artifacts.
Viashino Scavenger costs
less for each artifact sacrificed in this way.
Viashino Scavenger enters the battlefield with X +1/+1 counter on it where X is the number of artifacts sacrificed in this way.
Haste
4/4
I vote for Mown.