Perks
Intrinsic

• 
  Fusion Harness — Extra Fusion Grenade. Grenade kills charge Rift.

Mods

• 1 General Armor Mod socket
• 2 Chest Armor Mod sockets

Acquisition
This item can be obtained randomly from Exotic Engrams, and is occasionally sold by Xûr.

Notes

• A kill with a fusion grenade completely charges the rift.
• There is a bug which causes mid-air fusion kills to not recharge the rift when combined with Attunement of Sky.