Aldorn, Forge-Stolker

{x}, Sacrifice an artifact: Search your library
for an artifact card with converted mana
cost X, put it onto the battlefield, then shuffle
your library. You lose X life.
{x}, Sacrifice an artifact with converted mana
cost X: Gain control of target artifact with
converted mana cost X. You lose X life.
Artifacts you control have "{t}: Add {r}."