Unstable · #140
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Whenever you cast a silver-bordered spell, put a +1/+1 counter on this creature. Whenever you cast a black-bordered spell, this creature can't be blocked this turn. Whenever you cast a white-bordered spell, this creature gains double strike until end of turn.
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Border Guardian (UST 140, Foil) is an Artifact Creature — Knight from the silver-bordered Unstable set. It gains +1/+1 counters when you cast silver‑bordered spells, becomes unblockable when you cast black‑bordered spells, and gains double strike when you cast white‑bordered spells. The card interacts differently with spells depending on their border type, supporting casual or hybrid-format themes rather than sanctioned competitive play.
Catalog pricing data as of 22 Apr 2026, 12:37
