Swelter

Forced multi-target removal is a strange constraint to build around: this spell wants two creatures or it goes nowhere, and the 2 damage to each is locked at sorcery speed besides. That makes it a sweeper for a very specific board state, the kind where your opponent has committed exactly two relevant bodies in the same toughness range and you can erase both for four mana. Against a single threat it deals nothing useful, and against a wide board it leaves most of it standing. The design lives in that narrow window where two-for-one is genuinely on offer, which is rarer than it sounds and demands you read the texture of the board before you cast. Where a flexible burn spell pays a premium for the freedom to hit one thing or two, Swelter charges nothing for the second target precisely because it removes the choice: you cannot decline the split. That is the trade the card makes, and it explains why a 2-damage symmetrical hit reads cheaper than its mana value suggests on paper and more expensive in practice, since the requirement to find two legal targets is itself a real cost.