Arcum Dagsson [Coldsnap] Gatecrash instant and sorcery spells you

instant and sorcery spells you cast this turn cost {3} less to cast

sacrifice that many permanents

it becomes a Kithkin Spirit Warrior Avatar with base power and toughness 8/8

(You can't be the target of spells or abilities

and why did he feel so stiff

Arcum Dagsson [Coldsnap] Gatecrash instant and sorcery spells youSet: Coldsnap Type: Legendary Creature Human Artificer Rarity: Rare Cost: {3}{U} {T}: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle. "Artifice sundered the world. It shall not again wreak such sorrow."