After that, we need to find cuts to make room for new additions
Lotho, Corrupt Shirriff Lotho, Corrupt Shirriff can create Treasure for you during each players turn, which can give you a quick leg up in the game
Ashiok offers us a whopping 20 cards of self-mill for just three mana, AND simultaneously applies two brutal limitations to opposing decks
Common strategies include reaching a specific life total, like with Felidar Sovereign, or fulfilling a condition like Jace, Wielder of Mysteries, or Approach of the Second Sun
Cards like Unruly Catapult, Galvanic Juggernaut, Traxos, Scourge of Kroog, Staff of Compleation, Bender's Waterskin, and the game changer, Mana Vault all have ways to untap themselves
I think my dad was the first person to inform me of such wisdom, though I think he might have been making a comment about his third wife at the time