A-Celestial Regulator

Not yet bracketed (or genuinely unplaceable).

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3cmc 1/4 flying Angel; ETB taps a target opponent's creature, and if you control a creature with any counter on it, that creature also skips its next untap step. Signature in counters-voltron and plus-one-counters shells where counters are freely available to meet the condition. The lock effect is a minor stax contribution but relies on the counter condition, making it niche outside of dedicated counter strategies.