https://www.sageadvice.eu/a-creature-has-had-its-hit-points-reduced-to-0-by-a-specter-and-has-been-revivified-do-they-need-to-be-able-to-benefit-from-a-long-rest-in-order-to-have-their-hit-point-maximum-increase-again/
A creature has had it's hit points reduced to 0 by a Specter and has been revivified. Do they need to be able to benefit from a long rest in order to have their hit point maximum increase again?