so yes, you can attempt to cast while grappled. you may have to spend a full round action retrieving material components, and it can't have a somatic component, but yes.Originally Posted by casting while grappling.
an attached weasel is not considered to be grappling, as odd as that may sound. grappling can be used to detach it, but you have to successfully pin it to do so. unless the weasel has another means of attacking not listed in the generic stat block in the monster manual (ie: something special that you as dm are adding) it cannot attack and do other damage while it is attached. if it lets go, then it can attack again. if not, it does the con damage once per round.Originally Posted by weasel attach / grapple.
anyone else attacking either the attached weasel or fighter would use the rules for attacking someone in melee combat, with the associated penalties.
the other weasel could attach and drain if it wanted to.
not listed or mentioned in the monster manual entry, but an attached weasel becomes encumbrance if the fighter tries to move around. it weighs around 700 lbs after all. realistically, he might not be able to move at all.
note that if the weasel decided to grapple and won, then it could do damage via a grapple check (but not with the bite attack) even if it was attached.
you can use a natural weapon in a grapple. this means that if a creature is grappling, then it can bite or claw for it's damage component. also, note that you get the -4? this is assumed that you are doing lethal damage, as mentioned in the other entry for damaging an opponent by using a grapple check instead of a weapon.Originally Posted by damaging opponent in grapple
so basically, you have four options to attack during a grapple. 1) unarmed strike at -4 (which will be non-lethal unless you are a monk or using a gauntlet). 2) natural weapon at -4 for lethal. 3) light weapon at -4 for lethal. 4) deal damage via grapple check at no penalty. the damage is the same as that for a normal unarmed strike. if the creature is large, you will need to figure out what the unarmed damage would be. (the weapon size table: larger and smaller weapon damage, will tell you the exact amount.)