Exotics can be sourced in a number of ways:

• Decrypting Exotic Engrams
• Random rewards from Public Events, chests, Crucible matches and other activities
• Special vendors, such as Xur
• Specific quests and missions
• Bright Engrams (for cosmetic Exotic items)
• Increasing your drop rate with Three of Coins

Destiny 2 Ace of Spades (Exotic Weapon)

• Weapon Type: Hand Cannon
• Energy Type: Kinetic
• Ammo Type: Primary
• How to Unlock: Cayde’s Will exotic quest
• Special Perks:
  -Memento Mori: Reloading after a kill loads a magazine with a few extra-damage bullets. Grants radar while aiming down sights.
  -Firefly: Precision kills with this weapon increase reload speed and cause the target to explode, dealing solar damage to nearby enemies.
• How to find Catalyst: Strikes and The Ordeal
• How to upgrade Catalyst: 500 kills
• What the Catalyst does: Firefly deals more damage while Memento Mori is active.
• Strengths: Memento Mori is very strong in PVP (best hand cannon by many)
• Weaknesses: Memento Mori goes away once weapon is stowed