Tom and Xam - Borderlands 3 Farming Guides
Location: Heart's Desire on Xylourgos (Guns, Love and Tentacles DLC)
Part of: The Call of Gythian Story Mission
Drops: Soulrender (Dahl AR)
Tom and Xam are two bosses that you'll face off against at the same time while completing the final Guns, Love and Tentacles DLC Story Missions. You'll find these bosses in the Heart's Desire zone right next to the "What Beats Beneath" fast travel terminal in the center portion of the zone.
I recommend splitting the damage you deal to these enemies amongst them before finishing them off. The reason for this is once you down one of these two bosses the other boss will gain an additional health bar for however much HP they had left when the first mob died. To give you an example of how this works, if you get Xam down to 80% health before killing Tom, then you should expect Xam to gain an additional health bar of 80% health.