Storm of Steel

6-level Conjuration

You summon a multitude of portals behind you, all glowing with a bright golden aura. A massive storm of swords, spears, and axes suddenly fly out of the portals, dealing heavy damage to anything within range.
All creatures within range must make a Dexterity saving throw. On a fail, they take 1D20*2D8 slashing and piercing damage. On a successful save, they take half.
When casting this spell with spell-slots higher than 6th, add an extra D8 to the damage. A maximum of 5D8.