Deny Death

Through a great exertion of willpower, you bind the soul of a dying creature to its own body. For the duration of the spell, the creature cannot fall unconscious, even after falling to 0 HP or dying. The creature still has to make death saving throws and suffers the normal effects of taking damage while at 0 hit points, with the exception that they can move and act as normal even after death.

For the duration of the spell the target is also under the effect of the Gentle Repose spell. The death of the target doesn't end the spell, but the destruction of the target's body (due to effects such as the Disintegrate spell) does end the spell.