Sozin's Comet

The trick with a mass firebending grant is that the mana it produces is chained to the combat step: five creatures attacking generate twenty-five red mana that empties out when combat ends, so an empty board turns this into a five-mana blank. What the card demands is a wide team already committed to the red zone, then hands you a flood of mana that must be spent inside combat. The design lives in that timing window. Firebending 5 triggers on attack, meaning the mana pools before blocks are even declared and stays available through the declare-blockers, combat-damage, and end-of-combat steps. A defender who trades or chumps does not shrink the payout: you are paid for showing up, not for connecting, and you have the full combat to point the mana somewhere before it drains away. What you spend it on is the open question the card refuses to answer for you: a giant X spell, a fistful of burn, a combat trick large enough to justify the whole apparatus. Foretell softens the one real weakness, that a five-mana do-nothing on a stalled board is a dead card. Exiling it face down for two lets you bank the effect on a quiet turn and unload it later at a discount, converting a clunky top-deck into a pre-committed alpha strike. The result is an unusually honest engine: it does exactly one thing, generates a volume of mana that only matters if you have somewhere to aim it mid-combat, and asks you to build the attack step around it rather than the other way around.