Culling Scales

Destruction sorted by mana value, fired automatically every one of your upkeeps, with no off switch. The targeting clause is the whole engine: it hunts the cheapest nonland permanent on the board, which in practice means tokens, mana dorks, Signets, and other one-and-two-drop scaffolding die first while your own bombs sit safely above the kill line. That makes it a curve weapon rather than a removal spell: you do not aim it, you build around it, loading your deck with permanents priced higher than everything you want to wreck. The forced "destroy target" wording is also a quiet liability, since a single cheap permanent you would rather keep can become the obligatory victim when the board offers nothing else, and the trigger does not let you decline. As a piece of repeating attrition it answers the boards that beat fair decks by going wide and cheap: it grinds a hand of tokens or a swarm of small utility creatures down one permanent per turn, indefinitely, for a fixed three-mana investment that never has to be recommitted. The price for that relentlessness is precision; it will rarely reach the planeswalker, the haymaker, or the equipment that is actually winning the game, because those are seldom the cheapest permanents its targeting rule finds.