Edward, Skillful Wanderer

Haste, basic landwalk. Each artifact card in your hand has “Transmute {U}{B}{R}“. Whenever a player sacrifices a creature to pay for a cost of a spell or ability, Edward deals 3 damage to them. {U}{B}{R}, {T}: Transmute target artifact. (Destroy it. If you do, its controller searches their library for an artifact card with the same mana value, puts it onto the battlefield, then shuffles. Then if no card is found this way, that player creates X Treasure tokens, where X is{Lns} the mana value of the destroyed permanent).