Is the Lesser Phantom spell affected by critical effects?

[pearto]

Lesser phantom spell (level 5), from Mind Illusions, Of Mentalism, p.66.
The target is attacked by a creature of shadow. The creature is actually a mental illusion and only the target sees the creature. The creature will immediately attack the target (in melee). The creature has an AT of 1, but has the same DB, OB and Hits as the target. The creature is immune to spell attacks. If the creature is slain (by killing or incapacitating it), the spell is cancelled. Duration 1 min/10 fail.

What damage does the Phantom take from crits done to it by the target?
It would take hits (once at zero the spell would end)
If the effect of a crit is that 'foe' is incapacitated the spell ends
If the effect of the crit is death/slain, the spell ends

What about hits per round?
Stun?
Negative to activity?
Broken limbs?

Any thoughts or insights are appreciated.

[Spectre771]

As this question is posed in the general Rolemaster thread, I can offer some info from RM2. 

For situations like this, we always referred to the info C&T provided.  Chances are extremely high that the stats for "Phantom, Lesser" are in C&T as it was published well before C&T2 and C&T3.  Possibly RMC-I would have stats, but I've done a lot of reading of C&T.

Most undead are immune to bleeding and stun.  Chances are even higher that they are only injured by magic weapons or higher quality weapons (silver, mithril, eog)  There are no bones to break, so limb incapacitation is not an issue, and it probably doesn't even have legs if it's a phantom, not a walking undead type creature.

[MisterK]

Nope, nothing, misread the initial post.

[jdale]

The spell explicitly calls out immunity to spells but not to anything else, so I would assume the phantom is affected by everything else normally. It's an imaginary creature, it doesn't have any real nature but will respond as the combatant expects, i.e. like a regular creature. In general if things aren't specified, assume they are normal, extra powers are not normally present only via vague implication.

Given the stats, it's least effective against a heavily armored fighter...  but I cast it on the party's monk resulting in a virtual TPK. (Two PCs fled, the rest were captured.) The worst part was one PC spent three rounds climbing up to the walkway where the caster was... then jumped back down before attacking them because it didn't look like they were doing anything important!