Hi, I have a few questions with regard to interrupting spellcasting:
Can you use a counterspell against a spell with a casting time of a swift action? - I know it says in the book that any metamagic feats does not change anything with regards to a counterspell, but what about spells like featherfall which already have a swift action cast time?
Another similar question is:
In 3.5 it was considered more optimal to ready a dmg spell against an enemy caster in order to interrupt a spell. Is it also possible to ready a dmg spell to interrupt a swift action spell?
Lastly:
Can dispell magic counterspell a prismatic wall? It says under primatic wall that it cannot be dispelled by a dispell magic, but can i be countered by it?
yes you can counterspell a swift cast spell.
featherfall is an immediate action, still it can be counterspelled.
you can ready a damaging spell just like a fighter can ready an attack.
dispel magic can counterspell any spell, once the prismatic wall is actually cast it is a different story.
Lastly:
Can dispell magic counterspell a prismatic wall? It says under primatic wall that it cannot be dispelled by a dispell magic, but can i be countered by it?
Yes. You can counter (attempt to, anyway) any spell by Dispel Magic as it is being cast. Spells that state they 'cannot be dispelled by Dispel Magic' refer to the act of getting rid of them after they are already in effect.
Thanks for the quick answers =)
One more thing I just thought about is:
Would a ring of counterspelling(with dispell magic in it) work to cancel a counterspell from another wizard(using dispell magic of couse).
According to RAW yes, it sounds a bit fishy to me, but I suppose if it defends against a targeted dispel magic counterspelling should be alright as well.
Not sure I'd allow it's use, it somehow doesn't fit for me.