7th-level Spell: Incandescent Blade

Aspetheurgy (Evocation)

You take hold of a mundane dagger or sword, and turn it into an enormous white-hot blade of glowing metal. The sword gives off dim light in a 20-foot radius, and an overwhelming heat that deals 2d6 fire damage to all other creatures starting their turns within 5 feet of you.
While wielding the sword, you can use your action to make a melee spell attack against one creature within 10 feet of you, dealing 3d8 fire and 3d8 slashing damage on a hit. You can make another attack as part of the same action against one other creature that is adjacent to the initial target. Alternately, you can use your action to attempt to impale one creature within 15 feet of you. The target must make a Dexterity saving throw. On a failure, they take 6d8 fire and 6d8 piercing damage. If this reduces them below 30 hit points and they are not immune to fire damage, they are incinerated, dying instantly and turning to ash. After attempting to impale a creature in this way, the spell ends, with the weapon vaporizing into nothing from the intense heat.
Source: SMS

• Casting Time: 1 bonus action
• Range: Self
• Components: V, S, M (a mundane dagger or sword, which is consumed)
• Duration: Concentration, up to 1 minute
• Ritual: No