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Creatures don't untap during their controllers' untap steps. Whenever a creature enters, untap all creatures.
Abilities, attacks, weakness & resistance
Other cards from Stronghold
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Intruder Alarm (STH 34) is a blue enchantment from the Stronghold set. Its static effect prevents creatures from untapping during their controllers' untap steps while its triggered ability untaps all creatures whenever any creature enters the battlefield. The card enables combos and unusual attack/defense timing by turning enters-the-battlefield events into repeated untap opportunities.
Catalog pricing data as of 18 Apr 2026, 16:50
