Smelting Vat

", : Look at the top X cards of your library, where X is the greatest mana value among artifacts you control. You may put an artifact card from among them onto the battlefield. Put the rest on the bottom of your library in any order."

"At the beginning of your end step, you may sacrifice a creature. If you do, look at the top X cards of your library, where X is that creature's mana value. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

"At the beginning of your end step, if you control a creature, look at the top seven cards of your library. Then you may sacrifice a creature. If you do, you may put a creature card with mana value X or less from among those cards onto the battlefield, where X is 1 plus the sacrificed creature's mana value. Put the rest on the bottom of your library in a random order."

", Sacrifice another artifact: Exile the top X cards of your library, where X is one plus the mana value of the sacrificed artifact. You may play those cards this turn."

"Look at the top seven cards of your library. Put up to X artifact and/or creature cards with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

"Whenever this card attacks, look at the top four cards of your library. You may put any number of artifact cards with mana value less than or equal to this card's power from among them onto the battlefield tapped. Put the rest on the bottom of your library in a random order."

", Sacrifice an artifact: Add an amount of equal to the sacrificed artifact's mana value."

"At the beginning of your upkeep, put a time counter on this card. Then look at the top X cards of your library, where X is the number of time counters on this card. You may put a nonland permanent card with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

", , Discard a card: Look at the top X cards of your library. You may put a creature card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

", Sacrifice an artifact with mana value X: Return target artifact card with mana value less than X from your graveyard to the battlefield. It gains haste until end of turn."

", Sacrifice an artifact: Add an amount of equal to the sacrificed artifact's mana value. Spend this mana only to cast artifact spells or activate abilities of artifacts."

"Reveal the top X cards of your library. You may put any number of artifact cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield into your graveyard."

", , Sacrifice another artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery."