Since the text on concentration does not require an action (small a) to drop concentration, nor a reaction, then parsing that text literally supports Lino’s answer: you aren’t using an action, so “any time” can be interpreted as “any time, to include when some other character is taking an action within that six second …
Can you drop concentration on polymorph?
I believe the simplest answer is that Polymorph does not interrupt concentration. The main reason is – because the spell itself is concentration and you can polymorph yourself. If Polymorph broke concentration – you would cast it on yourself and it would immediately break.
Can you drop concentration any time?
You can end Concentration at any time (no action required). Normal activity, such as moving and attacking, doesn’t interfere with Concentration. The following factors can break concentration: Casting another spell that requires Concentration.
Do magic item spells require concentration?
The spell uses its normal casting time, range, and duration, and the user of the item must concentrate if the spell requires concentration. This rule would be used in the case of an item such as a Staff of Fire, which allows you to use it to cast the spell Wall of Fire (which requires concentration).
Can polymorph be dropped?
A large creature (say 1000 lbs) is polymorphed into a tiny creature. The tiny creature (2 lbs) is lifted into the air and dropped from a height of 200 feet to do 20d6 damage. The rule is that it receives this damage until it is reduced to 0 hp, and then the damage carries over to the original form.
What happens if you lose concentration on a spell?
Some spells require you to maintain concentration in order to keep their magic active. If you lose concentration, such a spell ends. If a spell must be maintained with concentration, that fact appears in its Duration entry, and the spell specifies how long you can concentrate on it.
Can You Drop concentration on the reverse gravity spell?
When you cast the spell Reverse Gravity (5e), creatures start falling upwards into the air.
When can a caster stop concentrating on a spell?
If a spell must be maintained with concentration, that fact appears in its Duration entry, and the spell specifies how long you can concentrate on it. You can end concentration at any time (no action required). The rule is very short and only says “at any time (no action required)”.
What is the duration of the polymorph spell?
The Polymorph spell states a Duration of Concentration, up to 1 hour. Concentration rule states nothing about losing it if losing intelligence (and even Feeblemind states that the creature can identify friends, follow them, and even protect them). The Polymorph spell states that the creature retains its personality (and alignment).
