The spell shapechange states that the you can’t use legendary actions, but…

Demiplane: is the shadowy door visible only to caster?

If you cast Time Stop and cut a rope bridge does the bridge fall?

If an Oathbreaker Paladin is multiclassed, does the Control Undead Channel Divinity use character level?

Can an elf concentrate on a spell while meditating?

Is the Staff of Defense a +1 quarterstaff?

There any way other than burning a whole feat to learn a new language in 5e?