Goblin Welder

Creature - Goblin Artificer 1/1, R (1)
{T}: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.¹
"I wrecked your metal guy, boss. But look! I made you an ashtray."
Illus. Scott M. Fischer

Gatherer Card Rulings [Nov 2009]

• 8/1/2008: As the new wording makes clear, both targets must still be legal as the ability resolves in order for it to do anything. If either one or both has become illegal, nothing gets sacrificed and nothing gets returned to the battlefield.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Urza's Legacy (Rare)