Carthus Flame Arch

A nonmagical weapon you touch becomes infused with the Carthus Flame. For the duration your weapon attacks deal an extra 1d6 fire damage when it hits.

While infused this way your weapon becomes magic for the purpose of ignoring resistances.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases with 1d6 per lvl. Up to a max of 5th lvl.