Crucible of the Elements

Using the material components, you draw a sacred warding circle around one willing creature that must remain within the circle until the ritual is complete. As you incant the words of the spell, a cylinder of mist arises inside the circle, obscuring the creature within. You transmute the mist to fire, and the creature within the circle must make a successful Constitution saving throw or take 6d6 fire damage; you transmute the fire to ice, and the creature within the circle must make a successful Dexterity saving throw or take 6d6 cold damage; you transmute the ice to whirling gravel, and the creature within the circle must make a successful Strength saving throw or take 6d6 bludgeoning damage; you transmute the gravel to mist, and the creature within the circle must make a successful Wisdom saving throw or take 6d6 lightning damage.

Any attempt to aid the creature within the circle will disrupt the ritual. The warding circle blocks all other spells or spell effects. If the ritual is disrupted for any reason, the spell fails.

If the creature leaves the circle or drops to 0 HP, the spell fails. If the creature completes the ordeal within the circle with at least 1 HP remaining, its Constitution score is permanently increased by 1.

You may not cast this ritual more than once for any one creature, regardless of success or failure. If the subject creature has ever participated in this ritual with another caster, regardless of success or failure, it makes all saving throws with disadvantage.