Immunity to a beneficial effect?

[Zaboom!]

How do you handle a creature with an immunity to something it might actually want to be effected by? Does the spell/effect simply fail to work? Or can certain creatures "switch off" undesirable immunities as they wish. Specifically, in this case, an Ooze (an intelligent one) that wants to be effected an Alter Self spell (a polymorph effect)...but as an ooze, it happens to have immunity to polymorph.

Thanks.

[Velcro Zipper]

A fire elemental cannot choose to take fire damage and an undead or construct can't choose to be affected by poison so I say the ooze cannot choose to be polymorphed.

[seekerofshadowlight]

I would say your out of luck.Maybe ya should try wish

[TriOmegaZero]

Sounds like a good quest, to research a method of giving form to the formless.

Why am I remembering Dragon Half here? :)

[kyrt-ryder]

It's the same problem with Mind Blank and bardic music.

You have a choice. Be immune to practically the whole school of enchantment and a few isolated spells and abilities here and there, or be able to get boosted by your bard companion.