Royal Rat Authority - Souls Lore

Spriteborne — Rat King covenant crest from Dark Souls 2. Shown

The Rat Queen(Dark Souls II TF) by wrathofautumn -- Fur Affinity [dot] net

Playing Dark Souls 2: Just googled rat king hoping to find a list of his covenant's rewards so I know whether or not to join - Imgur

Royal Rat Authority, Dark Souls Wiki

Gamer--freakz: Dark Souls II Boss Profiles: Royal Rat Vanguard/The Rotten

Corona Jumper: Dark Souls 2: Scholar of the First Sin - Followup

Tails of Iron is Hollow Knight meets Dark Souls, but for rat lovers

Dark Souls II page 3 of 5 - Zerochan Anime Image Board

Rstart Vs Royal Rat Authority - video Dailymotion

Dark Souls II: SotFS (PlayStation 4)