What's the Deal with Igor's Hump?

What's the Deal with Igor's Hump?

FACT #1: All mad scientists (and many vampires) have a hunchbacked assistant.

FACT #2: That assistant is always named Igor (some pronounce it EYE-gore, some EEE-gore)

FACT #3: Here's the deal with Igor's hump:

d10	Hump Type (hey oh!)
1	Black-Blood Blister – if Igor takes any damage there is a 50% chance it will rupture his hump, which is, in fact, a giant blood blister filled with the Black Blood of the Earth. If ruptured, the Black Blood takes 1d4 rounds to congeal into a coherent mass that then attacks everyone nearby (use the stats of a Black Pudding).
2	Camel-like Fluid Storage – Igor's hump contains a randomly-generated potion. If Igor is killed without damaging his hump, the characters may be able to siphon it out of him as the least-appealing treasure ever.
3	Demonstone Tumor – Igor's hump is actually a tumor caused by small pieces of demonstone that are embedded in his back. The demonstone causes any spell cast within 30' of Igor to trigger a roll on the Magical Mishap Table.
4	Embedded Meteor – what looks like a hump is actually an meteor from space that collided with Igor's back. The radiation from the meteor has been slowly mutating Igor; at the moment that is least convenient for the player-characters Igor will transform into an evil Shambling Mound.
5	Hardened Bone – Igor's hump is a giant knob of bone. Indeed, Igor's skeleton is hard as iron, granting him a +2 bonus to his Armor Class.
6	Mold Infection – Igor's hump is really a symptom of an inner mold infection. If Igor takes any damage there is a 50% that his hump will explode into a cloud of mold spores (use the stats of a Gas Spore).
7	Psychic Brain – Igor's hump houses a second brain that possesses the mind blast ability of a Brain Lasher.
8	Pus-filled – instead of being a solid mass, Igor's hump is really a pus-filled membrane. If Igor takes any damage there is a 50% chance that his hump bursts open, discharging a thick yellow and green ooze. This pus takes 1d4 rounds to congeal into a coherent mass, which then attacks everyone nearby (use the stats of a Green Slime).
9	Stunted Twin – what looks like a hump is actually the visible portion of Igor's twin brother who failed to develop properly in utero. The hump can detach itself from Igor's body at will to wreck havoc (use the stats for a gremlin).
10	Tentacle Cluster – Igor's hump is a gift from the Demon Lord Zzorch. It can sprout a multitude of tentacles to attack with; while the tentacles do no damage on their own, they possess the paralytic ability of a Cadaver Grub.