Fiery Intervention

In Commander, Fiery Intervention competes in a crowded slot — red has access to Chaos Warp, Generous Gift, and Generous Gift effects that answer more threat types for the same or less mana. The two-for-one is real, but only when both halves of Fiery Intervention line up against live targets, which isn't guaranteed in a four-player game. In Pauper, where card advantage is harder to come by, the modal flexibility is more meaningful and worth considering in red-based control shells. In Legacy, Modern, and Pioneer, five mana is simply too much for a removal spell that doesn't end the game or generate tempo, so Fiery Intervention won't see play in those formats.