Duel Oath

To cast this spell, you must shake hands with a willing creature who is able to cast spells, and say “May the best spellcaster win.” This binds the two spellcasters as duelers for the duration, and causes them to be directly involved in the spell’s effects. If both duelers cast the spell together, they do not expend a spell slot. This spell’s point of origin is the point on the ground directly below said handshake, and the area of effect envelopes everything in a sphere within a 50-foot radius, ignoring obstructions. All creatures other than the two duellers inside the sphere are safely transported to the nearest point outside the sphere that is not occupied by another creature/object.

The spell creates an invisible barrier of magical force at the sphere’s edge. Other spells and magical effects cannot protrude into it, but it can be smashed open with a melee attack, with a DC of 11. The spell also has an aura of positive energy inside of it’s area. The duellers, while inside the sphere, are able to make death saving throws, whether or not they were able to previously. If a dueller inside reaches 3 failed death saves, or dies instantly, it becomes stable instead, and is unconscious. If it reaches 3 successful saves, it heals 4 + 1d4 hitpoints, and becomes conscious. If it rolls a 20 for a death save, then it heals an additional 1d4 hitpoints.

This spell ends when one dueler shouts “I forfeit!” or when a dueler reaches 3 failed death saves or dies instantly.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the amount the aura heals for 3 successful death saves increases by 1d4 for each slot level above 1st. The amount it heals for a 20 on a death save also increases by an amount of d4’s equal to half of the slot level, rounded up. (Ex. If the spell is cast at 5th level, when you roll a 20 on a death save, you heal 4 + 2d4 + 5d4 hitpoints. Since half of 5 is 2.5, rounded up is 3, you would heal an additional 3d4 hitpoints. This all adds up to a total of 4 + 10d4 hitpoints.) The DC to break the barrier also increases by 1 for each slot level above 1st.