One of the effects of the celerity spell is that it reduces your weapon speed by one to a min of 3, in which case you gain a +1 to damage.
My question is if I am using a speed 3 weapon and already have Benediction of the Gods cast on my weapon by an ally, and another ally casts celerity would the +1 damage from each stack?
At a guess I say no. Those bonuses both come from a spell. Celerity still isn’t worthless to a dagger wielding PC with a Benediction for damage. You get a bonus to your pace.
