Edexx, Scrapyard Scavenger

Whenever an Artifact enters your graveyard from
the battlefield, deal damage to target Creature or
Player equal to that Artifact's Converted mana
cost.
{r}{w}{b}, {t}, Sacrifice an Artifact: Search your
library for an Artifact card with converted mana
cost X, or X plus one, and put it onto the battlefield, where X is the converted mana cost
of the Artifact sacrificed. Activate this only as a Sorcery