It served as both combo enabler and wincon, especially in conjunction with Agatha's Soul Cauldron, which could transfer its mana-making ability to other creatures
8 The Eleventh Doctor With The Eleventh Doctor out in play, all your opponents will stop and listen
If he is tapped and attacking when he receives this damage, you may untap him and start another combat phase.
Here's some of them: Rhystic Study, Necropotence, Dig Through Time Card Draw: Bojuka Bog, Scrubland, Tundra, Underground Sea, Godless Shrine, Hallowed Fountain, Watery Grave, Tainted Isle, Urborg, Tomb of Yawgmoth, Marsh Flats, Flooded Strand, Polluted Delta, Drowned Catacomb, Glacial Fortress, Isolated Chapel, Adarkar Wastes, Caves of Koilos, Underground River Lands: Sol Ring, Mana Crypt, Talisman of Progress, Talisman of Dominance Ramp: Fabricate, Demonic Tutor, Enlightened Tutor, Vampiric Tutor, Grim Tutor Tutors: Upgrading from the sample list is straightforward
It should also be noted that homemade proxy cards are banned from these events
