Dragonslayer

Weapon (lance), very rare (requires attunement by a fighter)

This point of this golden +1 lance is in the shape of a dragon flying through the air.

You have advantage on melee attack rolls against all dragons using the lance and deal an extra 2d6 lightning damage to dragons. Additionally, you have advantage on all abilities used by dragons while wielding this lance. Whenever you successfully attack a dragon, you gain resistance to damage caused by that dragon’s attacks and abilities for 1 round.