Time Ravage

Time Ravage is a dunamancy spell created by Matthew Mercer for the Explorer's Guide to Wildemount.

Spell description
The spell causes a creature failing a Constitution saving throw to age rapidly, taking 10d12 necrotic damage or half that on a successful save. If the creature ages, it will die of old age in thirty days, has disadvantage on attack rolls, ability checks, and saving throws, and its walking speed is halved. Only Wish or Greater Restoration cast at 9th-level can end these effects and restore the target to its previous age.