Amon's Planar Hardening

The caster transmutes the orderly frequency of the planar veil around them, increasing it's resonance randomly to harden and strengthen their allies weapons of war. Up to 6 allies, within 15 feet of the caster may offer up one weapon, of their choice, to increase its planar resonance, adding bonus damage. This will cause each ally's weapon of choice to do an additional 2d6 bonus damage on a successful hit and add +10 bonus critical damage on a crit that is in addition to the doubling weapon dice on a crit. This effect lasts until the end of the caster's next turn.

Verbal Component: "Fight Harder!"

Somatic Component: Casting the polyhedron onto the ground.

Using a Higher-Level Spell Slot. The bonus dice increase to 3d6 and bonus crit damage of +15 with a level 7-8 spell slot. The bonus dice increase to 4d6 and bonus crit damage of +20 with a level 9 spell slot.