Circle of Affliction

The whole engine hangs on a guess made before the game has shown you its hand: you name a color as the enchantment resolves, and from then on each damage event from a source of that color offers a one-mana payment that drains and refills. The trigger fires per source dealing damage, not per point, so a three-damage attacker still buys you a single payment for one life swing, not three. The design is a bet on prediction. Against a deck whose threats all share a color the chosen color is obvious and the trickle steady; against an unknown opponent it can sit on the battlefield doing nothing because the damage never arrives from the color you picked. That fragility belongs to a stretch of design that delighted in bending familiar effects into off-axis colors and timelines. Drain had long been black's province through targeted spells; here it becomes a persistent, repeatable tap that costs nothing to keep online but a single mana to fire each time, turning the opponent's offense into your life-swing rather than answering it directly. The friction is doubled: you commit to a color blind, then pay again every trigger, and you only profit when the predicted color keeps swinging at you. It rewards a board you can read in advance and punishes one you cannot, which makes it less a removal answer than a tax levied on a specific kind of attack you have already decided is coming.