
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.
Illustrated by Chris Seaman
Released on December 8, 2017
Playing a land won’t cause any of Border Guardian’s abilities to trigger. But for the record, Unstable basic lands don’t have a border.