Shrine of Limitless Power

The black entry in a five-shrine cycle keyed to color, and the one whose payoff is attrition rather than tempo. Two counter clocks run at once: a guaranteed tick each upkeep, plus a bonus for every black spell you cast, so a black-heavy deck stacks charges far faster than the passive rate suggests. The activation is the brake on all of it. Four mana, a tap, and the artifact itself, all to fire a single targeted discard scaled to whatever you have accumulated. That sacrifice clause is the design's honest cost, and also its protection: because sacrificing is part of the cost rather than something that happens on resolution, an opponent cannot destroy the shrine in response to stop the discard, and if they aim removal at it, you can simply activate in response (mana permitting) and still empty their hand. There is no incremental grind of one card per turn here. The shrine is a build-up engine that pays out exactly once, so the decision it forces is timing: fire too early and you have spent four mana to strip a card or two, sit too long and you risk never reaching the count that matters. The discard-everything ceiling is real in a deck that can reliably push the total high, but the floor is a slow permanent that telegraphs its whole plan to anyone who reads it and asks an entire turn to arrive at nothing.