Sisterhood of Karn

Paradox is an ability word that keys off where a spell comes from rather than what it does, and this Cleric bends that entirely toward growth. It shows up with a single +1/+1 counter and asks one question of the deck around it: how many spells can you cast from somewhere other than your hand? Each such cast doubles the pile, and crucially, the trigger fires on cast, not resolution: counter the spell if you like, the counters still double. One to two, two to four, four to eight, scaling geometrically instead of ticking up. That geometry is the whole appeal, and also the whole liability. Left to itself, it never crosses the starting line, a lone counter propping up a 0/0 base. Feed it impulse draw, flashback, foretell, or adventure casts and it outraces almost anything sharing its cost within a couple of turns. That asymmetry is the price of admission: the doubling is inert without an engine manufacturing non-hand casts, and lethal the instant that engine hums. The card cares nothing for your opening play and everything for your fifth. Its curve is deferred by intent, which makes it a stress test for a deck's willingness to shove its spellslinging into exile zones and libraries rather than the safe, hand-based baseline the rest of Magic is built around.