Mount Altana Guild

Mount Altana Guild is an unnamed anime-only Legal Guild located somewhere in the Kingdom of Fiore.

History
After Fairy Tail's disbandment, four members of the guild steal a fish from Happy in Mount Altana. While they were cooking their booty, Natsu Dragneel stating that they want the fish back. After stating that everything in Mount Altana belongs to them, the four Mages engage with Natsu in a fight, where the Fire Dragon Slayer easily wipes them all, alongside the whole mountain.

Strength
Nothing much is known about the entire strength of the Mount Altana Guild but is should be noted that four members of the Guild could not stand a match for even a drugged Natsu Dragneel.