Eldritch Weapon

You empower your weapon with elemental forces.

For the spell duration, your melee weapon attak deal 1d6 extra damage. When you cast the spell, select one of the following damage type : acid, cold, fire, lightning, or thunder. 

Once per round, as a bonus action, you can change the damage type.

This spell affect only your eldritch bonded weapon.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the extra damage increase by 1d6 for each slot level above 1st.