I have several questions about combat.
1) If I cast the Dread Curse of Azathoth (DCoA) while fighting two monsters in the same location, do I get the +9 to combat checks against both monsters until either both are dead or I'm unconscious/insane? Or does it only work against one monster?
IIRC, each fight against a monster is its own separate fight, so you only get the +9 vs the one you cast it.
2) If I don't get the +9 against both monsters, can I cast DCoA against monster 1 and another spell, say Shrivelling, against monster 2? This would use three hands.
3) If I'm fighting two monsters in the same location with a carbine, a knife and a revolver, can I use the carbine and revolver against monster 1 (let's say it dies in the first round) and then switch to using the knife and the revolver against monster 2?
You can change weapons/hands after each round of combat, i.e after you attack and then monster does damage.