Greatsword of the Battlemage

Requires attunement.
There are legends of orc wizards from long ago and their relics are sparsely spread across Faerun. This
relic was once belonged to an orc war chief, Holmg,
who fought on the side of men and was known for striking with precision and casting devastating spells with frightening speed.
This sword grants +1 to attack and damage. Once per long rest, you can cast a spell that has a casting time
of one action as a bonus action