mtg commander 2017 precon Roar of the World is the majestic leader and father to cats across all planes of the Multiverse Proxy Precon - Etsy

is a great land that offers any color you need, and it just so happens to give you a mana sink to attract more than one rat token each turn

While you do lose access to a lot of the strong mono-white and Orzhov lifegain cards, black supplies enough draining cards to support the theme relatively well

Theming-wise, the Necrons rely heavily on graveyard reanimation and are able to continually resurrect the troops continually

Blood Rite utilizes Vampires and sacrifice mechanics to build a powerful army, and Explorers of the Deep is a Merfolk-focused deck that accelerates explore and landfall effects for a synergistic strategy