Talk:Ultimate Great Spell, World Pandemic!/@comment-4873205-20171229110552/@comment-25709953-20171229111248

When you have a card that cannot be played based on the flag you have (i.e. playing a Executioners card in Divine Guardians), the card becomes completely blank and has no card text. Effectively, Soulguard fails to even exist and it goes away.

Only Omni Lords are immune from this, because a face-down flag is still a flag so they can still be used.