mill cards mtg Blue/Black Commander Deck - Custom Built - Elite - - EDH Is a card that causes

Lighthouse Chronologist Extra

you play in your deck defines the lowest bracket number it could fall into, and currently deckbuilding sites like Moxfield and Archidekt are assigning that bracket to decklists entered there by default, but its up to you, the player, to determine if the deck belongs in a higher numbered bracket

Generally speaking, this takes the form of ritual spells as well as cards that generate mana whenever a creature dies

Marketback Walker Marketback Walker provides you with a potentially large creature and potentially large card draw

Playing a 1GG spell and a UUU spell in the same deck does seem ambitious, but bear in mind that both of them actually cost three colorless