Codespell Cleric
The trigger keys off sequence, not just casting: the counter lands only if this is the second spell you cast this turn, which turns an unremarkable one-drop into a payoff pinned to a specific play pattern rather than a passive body. That "second spell" clause is a deliberate throttle. It rewards a deck built to chain a cheap first cast into this one, and it gives nothing to the player who leads on it in an empty turn. The design borrows a cast-counting idea familiar from magecraft-adjacent effects but pins the reward to a single enter-the-battlefield window rather than firing on every spell, which keeps the payoff modest and the deckbuilding pointed: you get one counter for clearing the threshold, not an escalating engine. Vigilance lets the body pull double duty once it arrives, and it gives the counter somewhere useful to land, whether on the Cleric itself to build a 2/2 that attacks without giving up its block, or onto a more pressing threat to push a clock. What the card is for is enabling a low-curve white aggro shell that wants to sequence two cheap spells a turn and grind incremental board advantage out of the ordering. Outside that context the counter is easy to whiff, and the 1/1 vigilance body is exactly what it looks like: an enabler-and-payoff piece for a spell-count aggro archetype, cheap, one-shot, and pinned to the sequencing around it.
