The Calus Mini-Tool is a unique SMG in Destiny 2 that is part of the Opulent weapon set in Season of the Haunted. Calus Mini-Tool is one of the few weapons with the MIDA Synergy Archetype, which gives the user additional speed benefits when the MIDA Multi-Tool Exotic is equipped. Without the Exotic equipped, the weapon still has phenomenal handling and allows the wielder to move faster. Additionally, Calus Mini-Tool deals Solar damage, making it perfect for the subclass' rework for Season of the Haunted.
Like all guns in the Opulent set, the Calus Mini-Tool is a weapon that players can craft in Destiny 2 once they've completed five Deepsight Resonance extractions. Fortunately, both variations of the SMG can be earned through the same drops, but it's much easier to get a standard roll. Nonetheless, players that have the time should still seek to craft their own Calus Mini-Tool so they can get enhanced perks.
Related: Destiny 2: How To Get The Firefright Auto Rifle (& God Rolls)
Players can get the Calus Mini-Tool by completing activities aboard the Derelict Leviathan, such as Sever and Nightmare Containment Tier III. Both activities can be completed multiple times on each character, so there are plenty of opportunities to get both weapons. Additionally, with enough Crown of Sorrow upgrades, players can even focus the standard and Deepsight variation of the Calus Mini-Tool with Umbral Engrams in the H.E.L.M. Lastly, players can also get Opulent Keys in Destiny 2 to open the chests around the Leviathan, giving them an additional chance at earning the SMG.
The Calus Mini-Tool has the same barrel and magazine options that other Rapid-Fire Frame SMGs have in Destiny 2, so many veteran players will be familiar with what they're
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