@reeplcheep
Yes, easier said than done, however, it may be possible with Lingering Souls.

Dorothea : the front looks ok, imo. The problem is in the back ( enchantment )
Who do you put this on ?
You need evasion AND survivability for that creature or it's worthless.

Just brainstorming here, but if the deck could have more full board hexproof and more lords it might work out.
say
4 Captains
4 Phantoms
3/4 Phantasmal Illusion. If they can copy a Captain you give both hexproof and both +1/+1 and +2/+2 to any other spirits.

Not saying this will work but it may be worth trying.