Xur has popped up again in Destiny 2 and will be on Io for four days after the initial appearance on 3 January 2020. This time around he has a rather nice weapon as well as a Hunter Exotic that should put smiles on many faces.
Xur's location on Io is not too hard to find. Spawn in Giant's Scar and look for the passage in the giant structure just north of your fast travel point. Go through it and then just continue straight north while sticking to the left wall. Xur will be in a cave, next to the region chest that you can also see on the map.
As for Captain Tentacle's inventory, he has Lord of Wolves as the featured weapon this week. This particular shotgun used to be bane of everyone's existence in PvP for a while and it is still really strong. It doesn't behave like a regular shotgun but rather a shotgun-pulse rifle hybrid since it fires five projectiles in quick succession instead of one that disperses. Holding the reload button will cause it to shoot double the amount of projectiles at which point you can one-shot even enemies under the effects of a Super.
Hunters get St0mp-EE5 this week or Stompies for clarity. They are a quick Hunter's perfect companion as they increase sprint speed, sliding distance and improve their jump. If you like SMGs or shotguns, you should give Stompies a go.
Titans who like shouldering their enemies will like Dunemarchers that are on offer this week. These boots increase your sprint speed and build up additional charge that will be released upon meleeing an enemy for AoE damage. Can be useful even in PvE if you are brave enough.
Sanguine Alchemy is what Warlocks will get this week. It is hard to find a good use for it but it can work well in PvP at times since it lets you track enemies through walls as long as you are standing in a Rift. Better get those Class Ability Energy mods going.