This is my Relentless Pony deck, which was played primarily back in 2004. See http://www.casualplayers.org/article/get.php?action=getarticle&articleid=870 for details. It's really the Ring of Ma'ruf engine that is of interest here, and the deck is based around that gimmick. I placed the Ring engine into a ridiculous Academy deck shell because, at the time that I first conceived this deck, I already had a control/combo Academy deck anyway. I was lazy in building this deck: I basically just removed the control elements from my Academy deck and used the room for the Ring engine. If I were to reassemble the deck today, I'd make some modifications. But I don't think that's particularly important, because it's the use of Ring of Ma'ruf that's of interest here anyway.
Some people find this deck confusing, primarily because it uses a minimum of three different engines, each moving the board toward the next one. The link (above) to my original article contains a sample goldfish at the bottom of the page.
Initially, the deck puts artifacts onto the battlefield and plays spells to draw cards in an attempt to get Tolarian Academy and Mind Over Matter, along with either Braingeyser or Stroke of Genius in hand. This part generally takes two or three turns, in which the deck appears to be a bad Academy deck, which is basically what it is.
Once the deck has its Tolarian Academy/Mind Over Matter combo, it discards cards with Mind Over Matter's ability to untap Tolarian Academy repeatedly, generating lots of blue mana. It then uses that mana to play a large Braingeyser or Stroke of Genius. This large amount of cards can then be discarded to repeatedly untap Tolarian Academy even more times, for even more mana, for an even bigger Braingeyser or Stroke of Genius. Soldevi Digger can put all of those cards back into the library, so this engine runs through the deck a large number of times, generating infinite blue mana and allowing one to tap or untap an arbitrarily large number of permanents. This part should take less than a turn.
Next, the deck uses the mana, untapping, and card draw provided by the Tolarian Academy/Mind Over Matter/Braingeyser engine to power yet another combo. First, I need an opponent with no creatures in play. If I can't find one, I use Capsize to return all of an opponent's creatures to that opponent's hand. I use Karn, Silver Golem to make Ring of Ma'ruf into a 5/5 artifact creature, then I use Donate to give my creatureless opponent control of my 5/5 Ring. I use Echo Chamber to make a token copy of the 5/5 Ring of Ma'ruf. The copy has haste. I then use the aforementioned unlimited untapping capability of the Tolarian Academy/Mind Over Matter/Braingeyser/Soldevi Digger loop to repeatedly untap Echo Chamber and make infinite hasty copies of Ring of Ma'ruf. With the aforementioned infinite mana from the same loop, I can activate a copy of Ring of Ma'ruf for each card in my entire collection. Finally, using Braingeyser, I draw all of the cards.
Note: Some opponents may spoil the fun by conceding. This deck doesn't have a way to address that directly, although it is possible to appease opponents with things like Phelddagriff.
Further note: This is strictly casual and is really only meant for multiplayer games. Tournaments restrict Ring of Ma'ruf to only retrieving sideboard cards, and the fun is in messing with a multiplayer game anyway. Use your imagination.
Even further note: originally made this deck in early 2004 using cards that I already owned at the time. Back then, making infinite copies of an artifact was trickier than it is now. If already having infinite mana, draws, and untaps from another combo and then using Karn to make the Ring a creature, Donate to give it to an opponent, Capsize to make it that opponent's only creature, and Echo Chamber to copy it seems needlessly convoluted, well, these days it sure would be. I haven't yet taken the time to modernize this deck.
Note that is further still: If you have ideas for modernizing this deck, feel free to share them. I will eventually remake Relentless Pony.
Note that is furthest of all: It's called Relentless Pony because my original default kill condition was to repeatedly play Dwarven Pony, give it haste, attack, and cast Relentless Assault, recurring all cards involved with Soldevi Digger and draw spells (Whispers of the Muse, usually).
