Staff of Domination This artifact was so good it was banned in Commander for years as an infinite mana sink
Fate Reforged - 2nd set in Khans of Tarkir block
Its worthwhile to build weird decks not for the masturbatory novelty but because doing so makes Magic more beautiful, more stimulating, and more fun
If you do, draw a card and create two Treasure tokens." Assassins, Mercenaries, and Rogues you control have deathtouch and "Whenever this creature deals combat damage to a player, you may remove a hit counter from a card that player owns in exile
It bears the exact same characteristics and abilities, and even assumes the identity of both an artifact and an enchantment, giving the player a surprising amount of adaptability to the changing battlefield
"Alpha, Beta, and Unlimited Editions"