Dwarven Catapult

The "divided evenly, rounded down" template is among the more punitive damage-division designs Wizards ever printed, and it defines everything about how this spell performs. Most X-spell sweepers let you assign damage where you want it; this one strips that agency away and spreads X across everything an opponent controls, then rounds each share down. The arithmetic is brutal against a wide board: point X at five creatures and each takes X divided by five, so you need to pay enormous quantities of mana before a token swarm starts dying, and even then the rounding eats your overflow. Against a single fat blocker it is competent, almost a focused burn spell; against the go-wide boards it superficially looks built to punish, it is nearly useless. That inversion is the card's signature flaw: the more targets there are, the worse the spell performs, which is exactly backwards from what a red mass-removal instant wants to do. The instant timing is the one genuine virtue, letting it function as a combat trick that thins an attacking force, but the even-division math keeps it from being the blowout the mana investment implies. The card predates the cleaner "divided as you choose" template that eventually made damage X-spells playable; here, even division is the balancing lever, and it overcorrects so hard that the spell undoes its own purpose.