Nullblade

Weapon (any sword), rare (requires attunement)

This technological weapon scores critical hits on a natural 19 and 20 and does double damage against constructs and is considered an adamantine and magic weapon for the purposes of overcoming damage resistances and immunities. As part of the attack, you may activate the nullblade, sheathing it in green energy granting it a magical bonus of +1. Finally, each time you strike an enemy with a nullblade the target must make a DC 15 Constitution saving throw or 1 random magic item or technological device is suppressed for 1 minute.

The blade may also dispel ongoing spell effects each time it strikes a target as if the enemy was the target of a dispel magic spell.