What is witherhoard catalyst?

The Witherhoard catalyst is an exotic catalyst for the Witherhoard grenade launcher in Destiny 2. It was added to the game in Season of the Chosen in 2021. The catalyst can be obtained by completing the Master or Grandmaster version of the Proving Grounds Strike, and it increases the weapon's magazine size and adds the Auto-Loading Holster perk. The Auto-Loading Holster perk automatically reloads the weapon after it has been holstered for a short period of time. The catalyst can be upgraded by completing kills with the Witherhoard in any game mode, and the upgrade bonuses include increased ammo reserves and handling. The Witherhoard catalyst is highly sought after by Destiny 2 players, as it enhances the already powerful grenade launcher and makes it more versatile in combat situations.