After all these responses, My conclusion is that this is a gray area in the rules. The Unbound trait hasn’t been defined. The d20 rules may or may not apply to ARG mods. So in those very rare cases where this comes up, I’ m going to use the following guideline, which seems to follow from Cody’s posts:
An infernal CAN be bound with the Bindings of Sarish spell unless:
1. The infernal has the Unbounf trait.
Or
2. The infernal’s description/stat block states that it can NOT be bound with the spell.
I assume that the 1000-eyed minions would fall into one of these categories.
The GM is always welcome to disagree and make his own ruling on the matter.
