Blade of Four Energies

This +2 greater striking shifting shortsword is formed of rapidly vibrating air and magical energy, though it uses the same statistics as iron. The wooden hilt is adorned with four gems, representing the energies of acid, cold, fire, and electricity, that sparkle in sequence at random intervals.

Activate f Interact · Frequency once per round · Effect You draw magical energy from one of the gems. Roll 1d4. Until the start of your next turn, the weapon gains the corresponding rune: corrosive, flaming, frost, or shock.

Activate 2 command, envision · Frequency once per day · Requirements The blade has an energy rune from the first activation · Effect You call upon the energy stored in the blade to explode outward. The blade of four energies casts a 5th-rank spell that depends on the active rune: Acid Arrow for corrosive, Fireball for flaming, Cone of Cold for frost, or Lightning Bolt for shock. The DC for these spells is 30 and the spell attack modifier is +20.