I've never put in so much effort into leveling a covenant before. We need 50/150/500 BP kills or Arena wins to level up. The former can only be done via (very expensive) Cracked Blue Eye Orbs or via the (extremely infrequent) guardian summons from the ring. The latter needs Tokens of Fidelity to even participate . You get nothing if you lose in either scenarios. Horribly shitty.
And killing BPs as a WP or as yourself doesn't even count towards the obscene rank-up requirements.
Seriously. This, along with Bloodbros, might be the most shittiest Covenants to rank up ever. I had a better time being a Bellbro and a Ratbro.