Bone Cage
You draw the bones from all corpses within range, forming a carapace of ribcages and femurs. You gain temporary hit points for each Small or larger corpse wholly or partly within range, according to its size, that last for the duration:
| Sizes | Temporary Hit Points Gained |
|---|---|
| Small | 1d6+1 |
| Medium | 1d8+1 |
| Large | 1d10+5 |
| Huge | 1d12+12 |
| Gargantuan | 1d20+25 |
As an action on a subsequent turn, you can cause your armour of bones to erupt, expending all remaining temporary hit points. Each other creature within range must make a Dexterity saving throw, taking piercing damage equal to your expended temporary hit points on a failure, or half as much damage on a success. Whatever the manner in which the temporary hit points are lost, the bones shatter and cannot be used in this way again.
Using a Higher-Level Spell Slot. The radius of this spell increases by 10 feet for each spell slot level above 5.
Heliana's Guide to Monster Hunting 503
V, S, M
the bones of at least one non-animated corpse, which the spell consumes
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