Permanents you control have "Ward—Sacrifice a permanent."
Each artifact card in your graveyard has unearth . (: Return the card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
Flood the board with artifacts, then turn your graveyard into a recursion engine—use Mishra's unearth to repeatedly fling cheap artifact creatures and value pieces for one-shot attacks and ETB triggers. The Ward on all your permanents (sacrifice a permanent) protects your key pieces while feeding sacrifice synergies, and the deck grinds advantage until you bury the table in artifact aggression or assemble an artifact-fueled combo.
Built-in graveyard recursion makes every dead artifact a reusable threat and ETB engine
Ward—Sacrifice a permanent makes targeted removal expensive and turns sacrifice into a resource, not a downside
Naturally synergizes with artifact tokens, treasures, and sacrifice payoffs all at once
Aristocrats and artifact-matters cards both fit, giving deep card-pool flexibility
Board wipes hit your token-heavy battlefield hard, and unearth only buys one turn back
Unearth is sorcery-speed and color-intensive ( each), so it taxes your mana
Legendary Creature — Human Artificer
