Deny Death

You create a ritual circle around a fallen creature that has died within 8 hours and force the soul to return to the body bringing life back to them temporarily. 

The effects grant life back to the target for 30 days and once over the targets body turns to ash and cannot be revived unless using the wish spell.

The only other way to fully revive the creature is with spells such as resurrection to be cast within the 30 days. 

30 days for every spell slot above 3rd can be added to the time of this spell.