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Red/Blue combo deck I actually used back in the Urza Saga Days. Mana accel overloads with the thran dynamo, grim monolith, and voltaic key synergy. The name of the game was to have enough mana to float in order to cast sunder and then blood oath for lethal by turn 5-6ish every game. Counters and burn were there to help as backup to stall the game and let the pieces get to their battlestations and fire off for the win. The dragons were there for as the backup wincon in case things get a little messy. The powerhouse of the deck was always the temporal aperture, able to speed up the sunder/blood oath combo as early as turn 3/4 with luck.
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