Aggravated Assault

Extra combat phases used to be the top end of a curve, the reward a token deck or a Sneak Attack haymaker leaned on once before the turn ran out. Here that ceiling collapses into a repeatable button: pay the activation, untap your team, and run combat again with a fresh main phase tucked behind it. The untapping is what turns a luxury into a loop, because it means a single haste-enabled mana engine can chain attacks until the table is dead. Speed is capped only by your ability to refund each time around, so the card became the canonical partner for anything that taps for big red on combat damage: Sword of Feast and Famine refilling your lands when it connects, or a creature like Neheb, the Eternal flooding mana off attackers. Without a payoff to fund the next activation, this is a slow sorcery-speed mana sink; bolted to one, it stops being incremental and becomes a kill on the spot. That conditional ceiling has kept it relevant as a build-around for two decades while flashier finishers rotated out. The smart move in the design is the refusal to print the combo onto the card itself: leave the loop open, set the price high, and trust the deckbuilder to supply the mana that closes it. An infinite-combat enabler sold without the infinite ever appearing in the text box.