Untamed Cloud of Death

This spell summons a cloud of pure death from the underworld. When this spell is cast the caster must make a DC 25 check with their spell casting abllity modifier. On a success the caster can use a bonus action direct the cloud to attack 1 character each round. When a character is attacked by this spell they are killed as the cloud rushes into there body and can only be resurrected by divine intervention from hel or hades. The caster can dispel the cloud as a bonus action. On a failed save the cloud will kill every one that was within 100 feet of its summoning in a random order. The DM Assigns every one a number and either picks randomly or rolls dice to determine in what order the cloud kills. The cloud has a movement speed of 12 miles per round. No matter how far away any one who was in 100 of the summoning runs, the cloud will eventually find and kill them. The only way to escape it is to planeshift away from the cloud but if they ever return to the initial plane, the cloud will find them. The cloud can also be defeated with a successful DC 26 dispel magic. Once all of them character within 100 feet on the initial summoning are defeated the cloud disappears.