Elemental Shell

   Upon casting this spell, target one creature within range. That creature makes a Strength saving throw. On a failed save, that creature is confined within a one half inch shell of the material it is standing on, or remains free if they succeed. A target entombed by this spell can make a Strength saving throw against this spell at the end of its turn.  If the creature is flying, they make their strength saving throw at advantage. If a flying creature fails its saving throw, it plummets to the ground at a rate of 30 feet per round. A creature that is outside the shell may attempt to break it via a Strength check (DC of 8 + spellcasting modifier of the caster).

   A creature that remains entombed by this spell for a full, uninterrupted minute must make a Constitution saving throw or fall unconscious and are treated as though they are suffocating. A creature has a number of minutes of air equal to their Constitution modifier (with a minimum of 1 minute). Creatures that do not need to breath are only knocked unconscious.

   A creature that perishes within the shell created by this spell is preserved against decay as if they had the spell Gentle Repose cast on them.