How long does hideous laughter last?

one minute

Is hideous laughter a bonus action?

So if someone is under the effect of Tasha’s Hideous Laughter, they can’t take the Reaction necessary to make an opportunity attack. They’d be able to crawl and do things that don’t require actions or reactions (or bonus actions) such as speak, but can’t do much else.

Can you hold concentration while paralyzed?

Unless the caster takes damage or is unconscious they maintain concentration. Or incapacitated like when paralyzed or petrified. Paralysis actually causes the incapacitated condition. Incapacitated also doesn’t get a concentration check, concentration simply ends when incapacitated.

Does grapple break concentration?

The actual ability “grapple” that can be used by players doesn’t cause damage. It’s not even an attack. So, no, it doesn’t break concentration. It doesn’t even prevent a caster from casting any spell.

Does Wildshape break grapple?

No, wild shape does not automatically break the grapple. Grappling applies the ‘grappled’ condition and conditions are not automatically removed when you wild shape. Further, once you have the grappled condition, the restrictions on grappling target size does not matter.

Does polymorph break grapple?

Yes. Nothing in the Polymorph spell says that it breaks a grapple, and nothing under the Grapple rules says that it is broken by polymorphing.

Can you polymorph an Oni?

There’s some odd wording here that isn’t identified as a typo in the Monster Manual errata: “The oni can polymorph into a Small or Medium humanoid, into a Large giant or back into its true form,” but its true form is a Large giant. (It can’t polymorph into other giants, nor into Large creatures of any other kind.)

How do you break the grapple in 5e?

You can break a grapple by wriggling (win a contest of Dexterity (Acrobatics) vs. Strength (Athletics)) or by force (Strength (Athletics) for both combatants.). Finally, yes, you can move, but at half speed, unless the target is much smaller than you (two or more sizes smaller to be precise).

Does Warcaster work with polymorph 5e?

No, you lose all of your statistics when you polymorph, which includes feats. You lose everything except your alignment and personality. They don’t have advantage on their concentration check after being hit for 40 points of damage because they don’t have the war caster feat in T-rex form.