Combined with the ability to see and shoot through walls, it's just sickeningly overpowered. La Varita on its own is an immensely powerful Resolver Weapon which can one-shot-kill almost any foot soldier with a headshot. You can obtain both La Varita and Triador by completing the Triada Relics trio of treasure hunts - the most challenging of which you can read about in our Far Cry 6 Oku's Triada Relic walkthrough. Triador's special ability is to see through walls, and La Varita's special ability is to shoot through walls. But there's a catch: in order for it to reach its full potential, you also need to be using its companion Supremo, Triador.
La Varita is by far the best weapon in Far Cry 6.