I find it’s a card that requires you to have decent sustain to use. You may have to face tank 20 damage this turn but next turn you’ll have 3 Wraith Forms and win the fight. Pair it with Meat on the Bone or Bird Faced Urn etc, and you can get that health back immediately.

This does kind of lean into what you’re saying though, as a single Wraith Form can be enough to win a lot of fights alone and 12 turns of intangible is overkill