How about a spell for DnD 5e?
Ravages of Nature
1st-level enchantment
Casting Time: 1 action
Range: 100 feet
Components: V, S, M (sand of the desert and water of a glacier)
Duration: Concentration, up to 1 minute
You choose a creature in range and that creature in instantly ravaged by the harshest environments on the planet. That creature makes a Constitution saving throw. On a success, the spell ends with no effect. On a failure, that creature receives on level of exhaustion. Each turn as a bonus action, you can cause that creature to make another Constitution saving throw. On a success, they do not improve, but on a failure, that creature increases their exhaustion level by one. You can continue to cause the creature to be exhausted until it succeeds three saving throws in a row, it dies, or the duration of the spell ends.
Thoughts?
Throat Punch Games 