Post/Author/DateTime	Post
#1 Undrhil Jan 21, 2015 21:23:36	I mentioned this in passing in another thread a while ago (many months) and either it got glossed over or this is just so obvious that no one bothered to say anything about it.   PHB wrote:
#2 AaronOfBarbaria Jan 21, 2015 22:22:03	I read war caster as being a more specific restriction than twinned spell - it is specifying that only one target can be had, and it must be the one provoking - rather than being a more permissive condition that creates a list of spells that can be used but only if conditions are right.
#3 lawrencehoy Jan 21, 2015 23:50:26	See the Basic Rules, pg. 79, under the heading for Range; fireball does not target creatures, it targets a point in space (as is typical for AoE spells). Only spells that specifically target a single creature (whether that is by caster choice or spell limitation) can be used with the War Caster feat opportunity attack.
#4 SilentSin Jan 22, 2015 1:19:30	I agree with lawrencehoy. War caster needs the spell to target only that creature. Fireball targets a point on the ground.   Both mechanics have the exact same restrictions on the spells that can be used, the devs just worded it differently to confuse people.