Cleon
Legend
Sure, that'll work.
"Not sure of ability name" (Su): Certain spells and effects function differently against a gray pudding, as noted below.
Flesh to stone acts as a slow spell on the pudding.
Transmute rock to mud causes the pudding to suffocate in its own mass. The pudding must immediately make a DC 10 Constitution check (and one each following round with DC of 10+1 per round) or start drowning. See the drowning rules in the SRD.
The pudding receives no save against either of these effects.
Do you think we ought to give it some way to get out of drowning?
The original text says the Gray Pudding's magic resistance can resist both the spells. How about adding some text that its Spell Resistance applies to a transmute rock to mud cast on it, despite the spell normally being "No SR"?