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
Giving your entire board indestructible blanks most removal and forces opponents to find completely different answers
and if you use this ability, you have to attack this turn if able, which is okay - you want to smash in anyway, right
Theming-wise, the Necrons rely heavily on graveyard reanimation and are able to continually resurrect the troops continually
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
Soldevi Adnate Although many know this effect from the somewhat recent Illuminor Szeras, Soldevi Adnate is older and cheaper