If I were to cast "touch of idiocy" onto a monster with a spell-like ability, would it affect its ability to use that ability?
Spell like abilities are based off of charisma and act like spells off the wizard/sorcerer list. “A monster's spell-like abilities are presumed to be the sorcerer/wizard versions. If the spell in question is not a sorcerer/wizard spell, then default to cleric, druid, bard, paladin, and ranger, in that order."
Also, "It is possible to make a concentration check to use a spell-like ability defensively and avoid provoking an attack of opportunity, just as when casting a spell. A spell-like ability can be disrupted just as a spell can be. Spell-like abilities cannot be used to counter spell, nor can they be counter spelled."
An aboleth can use "hypnotic pattern (level 2) as a spell like ability and it has a charisma of 17. If I cast "touch of idiocy on it and rolled a 6, it would be reduced to 11. Does that mean it can't cast that spell like ability? My gut reaction is it would lose that ability, however the aboleth CAN cast "dominate monster," a 9th level spell with only a 17 on charisma.
So my question is what are the repercussions of temporally lowering charisma on spell like abilities? For sure the saves would be easier for the PCs, BUT can you actually suppress the spell like ability? Would there be any other benefit?
FYI: Next session my sorcerer will be fighting a buffed up aboleth. I am not going to meta-game. My soorcerer would use "touch of idiocy regardless off how it will affect spell-like abilities, but I want to be clear on the rules before she does.
For sure the saves would be easier for the PCs, BUT can you actually suppress the spell like ability? Would there be any other benefit?
No.