This came up in our session and in some sense it points to a larger question for me regarding metamagic feats interaction with mostly conjuration spells.
We wanted to cast ectoplasmic black tentacles to grapple a ghost.
Ultimately what was proposed was shot down for a different reason - incorporeal creates can't be grappled but lets say for the sake of argument that we decide that two incorporeal creatures can grapple one another. Can the tentacles interact with a ghost? Does a ectoplasmic stone wall block ghosts? Does ectoplasmic fabricate create ghost touch materials?
Of course this makes me wonder about other metamagic feats with conjuration/transmutation spells. Does a dazing black tentacles cause dazing. Does a dazing ghost wolf attack get the dazing ability?
Ultimately what was proposed was shot down for a different reason - incorporeal creates can't be grappled
The ectoplasmic spell metamagic feat makes a spell that would not otherwise effect a incorporeal creature have full effect.
Which means their immunities from being incorporeal do not apply. They can be grappled by things that affect incorporeal creatures.
Ghost touch nets work 100% against incorporeal creatures, as do mancatchers, etc.
The tentacles from a incorporeal black tentacles would have 100% affect against an incorporeal creatures.
Ectoplasmic wall of stone is impenetrable to incorporeal creatures.
There is some dispute with fabricate, however. Fabricate doesn't actually create things, so could not infuse a product with ghost touch ability.
An ectoplasmic spell that actually creates permanent base components (steel for a sword, etc) is what you are looking for to create the base components to be used in a fabricate.
