Edited sentence: A successful activation, however, will cause an opponent to instantly lose the game.Cranial Plating is an equipment that boosts the equipped creature's power by the number of artifacts in play on its controller's side.Crucible of Worlds - notable for being the result of You Make The Card 2 feature of magicthegathering.Door to Nothingness - While simple to play, this artifact must survive long enough to be untapped, and requires 2 mana of each color to be activated.Eternal Witness is a cheap green creature that upon entering play, could return any card in its controllers graveyard to their hand.Helm of Kaldra is the last and crucial part of Kaldra's equipment: when you have all three of them (Sword, Shield and Helm) in play you can put Kaldra token in play, equipped with these, resulting in a 9/9 indestructible creature with first strike, trample and haste.However this feature of game play gave rise to degenerate decks, such as the 'Forty Lightning Bolt Special' and 'Berserk/Juggernaut' decks and so the 4 card limit was put in place.It became the foundation of a fast combo deck that used Myr Incubator and Goblin Charbelcher to kill the opponent.It immediately became a staple in Affinity decks.Krark-Clan Ironworks is an artifact that allows its controller to sacrifice artifacts for mana.Originally this card was tested as a 2/2 for 3GG instead of a 2/1 for 1GG.Relentless Rats is the first card other than the basic lands that lets you play as many as you want in your deck.That card was given out on the prerelease events of Fifth Dawn.The Crucible has become a powerful land-recursion tool in Vintage and Legacy, allowing the player to re-use the likes of Wasteland, Strip Mine, man-lands (ones that can be creatures) that die, and the  fetch lands from Onslaught set.The effect is a duplicate of the out of print card Regrowth.The idea was to create decks that used cards like Plague Rats to have an interesting tie in with other cards.The theme behind this mechanic dates all the way back to Alpha and Beta when players were allowed to play with any number of any card in their deck.The visitors of the site "designed" the card by voting for the different aspects of the card and submitting card rules and flavor text