Eco Weapon

You channel arcane energy into one weapon you’re touching, the weapon is sheated in pure magical energy. Until the spell ends, It deals an extra 1d6 damage of force damage to any target it hits with the weapon. If the weapon isn’t magical, it becomes a magical for the spell’s duration.

If you cast this spell as a ritual, the casting time is half hour in total for every weapon in the ritual and the duration of the spell is 2 hours but you can only cast it as a 1st lvl spell, you can only have one ritual of Eco Weapon casted at time and when you cast it as a ritual, you can cast it to as many weapons as half (rounded down) your spellcasting modifier at the same time.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher,  the spell duration is  8 hours and the damage die rise 1d6 for every two slot spells used above 2nd. The duration extends to 12 hours with a spell slot of 4th, 24 hours with a spell slot of 6th. If you cast this spell with a spell slot of 9th you can make it permanent but the added damage it's only 3d6.