A new 9th level spell, It has enough space for several suggestions Options

[Sikret]

I'm thinking on making another new necromantic spell, and a 9th level one this time.

By casting this spell, The mage manipulates his force of life to create a powerful effect, but the outcome will be random. In other words, each time this spell is cast one (and only one) effect randomly picked from a pool will take effect and the result will not be predictable.

I need your suggestions for these possible random effects. Since the effects are random, it has enough room for several different effects.

The spell is 9th level, so feel free to be generous in what you suggest (as long as they are not insanely overpowered). The randomness of the outcome also makes it plausible to have a few powerful effects among several ordinary ones.

Don't suggest things which clearly contradict with the spell's school (= necromancy). For example, a random effect which creates illusions or makes the mage invisible is not plausible.

I probably prefer the spell to affect no other creature than the caster (to be cast only on 'self') though I have not yet made my mind about this particular point with 100% certainty and I'm open to suggestions to change it. I think that confining the spell to be targeted at 'self' will probably make the spell's design easier; otherwise, we may have to worry about various other elements (what will happen if the spell is cast on an enemy? What if it is cast on a neutral commener or on a summoned creature and this or that random effect appears?); on the other hand, confining the spell to affect the caster will rule out some effects (for example an effect to cure stun will be out of question, because if the caster is already stunned, he can't cast the spell).

The spell's randomness makes it somewhat similar to "wish" spell; so, the two spells shouldn't have similar random effects. A mage can know and use both. None of the two spells should make the other one redundant.

[coineineagh]

Here's an idea:
What about making it a bit like the wish spell? Instead of summoning a djinn you get a lich, and he works for you not against you... you get random choices selected from the earlier ideas, but there's a chance of it failing (because although you order the lich to alter realities, it's slightly beyond his capabilities), resulting in the wrong effect, or maybe a wild surge?
It's a bit more complicated to pull off, but I'd use this kind of spell, not one with random effects.