An-Zerrin Ruins

This is a static answer that denies a chosen creature type its untap step: the player's untap step still happens, but the chosen creatures sit out of it. That is the blunt edge of an early design philosophy that leaned hard on creature types as a balancing lever, back when naming "all Goblins" or "all Merfolk" was a meaningful sentence to write and tribal synergies were not yet a deliberate archetype. As a global lock it is absolute against a strategy built around a single type and inert against anything diverse: total shutdown of a narrow target in exchange for nothing when the table is spread out. The mechanism is subtle but punishing. It does not prevent tapping; it prevents recovery from it. A locked creature that attacks or activates an ability cannot stand back up, so it stays exposed and cannot block on following turns. A creature that enters tapped or one an opponent taps is hit just as hard, because no untap step will release it once it is down. The only safe play under the lock is to never tap the affected creatures at all: hold them untapped and they function normally, vigilance does the rest. That makes the card a one-way ratchet rather than a true prison. It pins whatever commits to combat or to its own abilities, while a fresh, untapped threat of the named type still gets one action before the ratchet catches it. A static answer to a creature-type strategy, from an era that trusted the type line to carry the weight of the balance.