Mysidian Elder

The enters trigger here does something unusual: it doesn't drain anyone. It manufactures the engine and hands it to a separate, fragile 0/1 body that sits on the board waiting to be triggered. That token is the real card, and its clock runs on noncreature spells, so this is a payoff dressed up as a value creature. What the split buys you is redundancy on the drain axis without loading it onto the caster: the pinger lives on its own permanent, meaning a single spell triggers the token even when the caster is tapped out or dead, and multiple copies stack their pings from one cast. The tax is legible the moment you read the body: a 0/1 is the softest possible attachment point, dying to anything and doing nothing on its own, so the deck has to keep spells flowing and protect a creature that never wants to block or attack. It rewards a spell-dense, opponent-agnostic burn plan (the token hits each opponent, not a chosen target, which makes it scale with the number of players rather than the single-target red norm). The lineage runs through cards like Guttersnipe and Electrostatic Field, but those keep the pinger and the caster on the same permanent. Peeling the two apart, onto a token and the creature that makes it, is the structural wrinkle that earns this a distinct spot in that family.