In the moment of death of any creature you can revive them if the tree of life Yggdrasil allow it. Make a D20 Tests if you are not a part of Yggdrasil itself.

The creature returns to life with 3d6 health points or the maximum health points, depending on the smaller number.

Casting this spell to revive a creature taxes you. Until you finish a Long Rest, you can’t cast spells again, and you have Disadvantage on D20 Tests.