Disk of Ice

A floating 5-foot radius disk of ice appears in an unoccupied space of your choice within range and remains until the spell ends. You choose how the disk is oriented in space.

The disk is a Medium object that has AC 15 and 30 hit points. It is immune to cold, poison, and psychic damage and vulnerable to fire damage. If it drops to 0 hit points, the spell ends. The disk can hold up to 500 pounds. If more weight is placed on it, the spell ends. Objects can't pass through the disk's space, but it is clear enough to see through. If an attack misses due to cover granted by the disk, the disk takes the attack's damage.

When you cast the spell and as a bonus action on your subsequent turns, you may change the disk's orientation and move it 20 feet in a straight line.

If the disk is positioned edge-first, it acts as a razor blade. Each time the disk passes entirely through a creature's space, that creature must make a Dexterity saving throw or take 4d10 slashing damage.

If the disk is instead positioned face-first, it acts as a wall and can push creatures or unsecured objects. Each time the disk passes entirely through a creature's space, that creature must make a Strength saving throw. On a failed save, the creature is pushed to the end of the disk's path. (Unsecured objects are pushed in the same way.) On a successful save, the disk stops in front of the creature's space.

As an action on your turn, you can dismiss this spell and cause the disk to shatter, blasting a hail of shards in a 10-foot-radius sphere. Each creature in the sphere must make a Dexterity saving throw. A creature takes 2d10 piercing damage and 2d10 cold damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the disk's hit points increase by 10, and the damage the disk deals increases by 1d10, for each slot level above 5th.