Siege
A battle subtype. Only an opponent of a Siege’s controller can be its protector. When the last defense counter is removed, its controller exiles the Siege, then they may cast it transformed without paying its mana cost. See rule 310.11.
A battle subtype. Only an opponent of a Siege’s controller can be its protector. When the last defense counter is removed, its controller exiles the Siege, then they may cast it transformed without paying its mana cost. See rule 310.11.