mtg card calculator Tool: Hypergeometric Odds of Drawing a Specific

Your two-for-one opportunities will in no way be limited to just what you read here

What's important is that you have a good starting point, and then playing games will inform you if you should bump your numbers around

With the God Birgi out, you can keep generating more and more mana with each spell you cast

The deck is actually a Colorless Matters deck: the entire deck is colorless, of course, but also we have 15 cards that support colorless matters (Calamity of the Titans, Ugin, the Ineffable, lands like Tomb of the Spirit Dragon)

You've also got Regeneration (Boneknitter), graveyard love (Corpse Connoisseur), graveyard hate (Crypt Creeper), life loss (Organ Grinder), tutoring (Corpse Harvester), edicts (Fleshbag Marauder), Necropotence variants (Graveborn Muse), and can even destroy the occasional enchantment (Quagmire Druid)