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

Rat King covenant crest from Dark Souls 2. Shown rendered on a Charcoal Grey shirt and available at Spriteborne on . 

Noobie Tip: Make use of the Rat King Covenant as soon as you can

The rat king covenant is the absolute most fun I've had with all

Guide for Dark Souls II: Scholar of the First Sin - Grave of Saints

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

Rat King Covenant Crest : r/DarkSouls2

Rat King Dark Souls 2 Wiki

Rat King (character), Dark Souls Wiki

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

Dark Souls 2 - A Guide to Covenants: Rat King Covenant