Obscura Ascendancy

The trigger reads like a puzzle box: it fires only when the spell you cast has a mana value exactly one higher than the current soul counter total. Cast a one-drop first, then a two-drop, then a three-drop, and the counters climb in a tidy staircase, each rung dropping a flying Spirit and setting up the next. Miss a step (cast a spell of the wrong cost) and nothing happens, so the enchantment asks you to sequence your entire turn around it rather than dump your hand. Reaching five counters is where the effort cashes out: the whole Spirit board becomes a squad of 5/5 fliers built out of tokens the enchantment made itself. The design is unusually self-contained, both the token engine and the anthem for the tokens it produces, which is rare in a three-mana enchantment that needs no other card to function. The friction sits entirely in deckbuilding and play, since the incremental curve reward runs directly counter to how most spell-heavy decks want to sequence, and reaching five counters means committing to a curve that ascends one value at a time. Get to the top and it flips from a slow value trickle into a board-wide threat multiplier in a single line; stall at three or four counters and you have a modest flock of 2/2 fliers and a dead anthem waiting on a spell you may never draw.