While planning out the new Druid I'm rolling, I found many discussions on the internet saying that the War Caster feat is useful to take as it helps the druid maintain concentration while using Wild Shape (including at least one occurrence on this site.)
The War Caster feat (PHB 170) says:
Prerequisite: The ability to cast at least one spell
You have practiced casting spells in the midst of combat, learning techniques that grant you the following benefits:
- You have advantage on Constitution saving throws that you make to maintain your concentration on a spell when you take damage.
(Other benefits omitted.)
However, the Feats section (PHB 165) says:
You must meet any prerequisite specified in a feat to take that feat. If you ever lose a feat's prerequisite, you can't use that feat until you regain the prerequisite. For example, the Grappler feat requires you to have a Strength of 13 or higher. If your Strength is reduced to below 13 somehow -- perhaps by a withering curse -- you can't benefit from the Grappler feat until your Strength is restored.
When you use Wild Shape, a couple of the many rules (PHB 67) say:
You can't cast spells, and your ability to speak or take any action that requires hands is limited to the capabilities of your beast form. Transforming doesn't break your concentration on a spell you've already cast, however, or prevent you from taking actions that are part of a spell, such as call lightning, that you've already cast.
You retain the benefit of any other features from your class, race, or other source and can use them if the new form is physically capable of doing so. ...
(Other rules omitted.)
So, it appears the logic goes like this:
- Cast any spell that requires concentration
- Use Wild Shape and continue concentrating on the spell
- Druid no longer has the ability to cast spells (unless they are level 18+), but retains the benefit of all feats that the new form is capable of using (as a feat is a feature of the class or race - ASI or human variant)
- War Caster feat can no longer be used as the prerequisite is no longer met since the Druid doesn't have the ability to cast at least one spell anymore
- Any Constitution saving throws made to maintain concentration on a spell while taking damage will NOT be at advantage (assuming no other source of advantage is present)
Is my logic correct for a druid from 2nd to 17th level? Or is there some other rule or ruling that keeps the advantage for the Wild Shaped War Caster Druid when making these Constitution saving throws?
(Druids get Wild Shape at 2nd level; at 18th level, druids get the Beast Spells feature, which lets them cast spells that don't have material components while in Wild Shape. Thus, the question's only relevant at levels 2-17.)
Given the internet's love of pointing out when people are wrong, and me finding at least 3 instances where someone explicitly mentions War Caster as being useful while using Wild Shape, I'm inclined to think I've missed something. However, I can't find what I've overlooked in the rules. (Although, based on past experience, about 7 second after posting I'm sure I'll figure it out.)