Interfacer is a seraph shotgun in Borderlands 2 manufactured by Hyperion. It can only be obtained as a rare drop from Voracidous the Invincible, Dexiduous the Invincible or Omnd-Omnd-Ohk in Ultimate Vault Hunter mode, or from the Seraph Vendor in Hunter's Grotto in True Vault Hunter and normal modes.

How do you get the butcher in Borderlands 2?

The Butcher can be obtained randomly from any suitable loot source, but has a higher chance to drop from Uranus, 010011110100110101000111010101110101010001001000, and legendary loot midgets.

Can you get seraph crystals in TVHM?

You can get seraph crystals from the TTAODK slots in TVHM, but they won't drop off raid bosses until UVHM.