Drifter, Unchecked Hoarder

Trash to Treasure: whenever a creature you control deals combat damage, put that many scrap counters on Drifter. {I}Salvage Remove 8 scrap counters from Drifter: Create 2 copies of target artifact, except they have vanishing 4 {I}Tinker{/I} Remove 6 scrap counters from Drifter and Sacrifice an artifact: reveal cards from the top of your library until you reveal an artifact card with mana value less than or equal to the mana value of the sacrificed card, then put it onto the battlefield under your control. Put all other revealed cards onto the bottom of your library in a random order.