mtg card calculator Tool: Hypergeometric mtg card probability calculator I

For two mana of any color, you can search your library for any dragon, discard it, and Scion of the Ur-Dragon becomes that dragon until the end of the turn

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)

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

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

Magic: The Gathering 1998 Wizards of the Coast, Inc