mtg commander cascade deck The First Sliver EDH | Sliver Deck Quandrix, the Proof Commander Deck

Most of the formulas are composed of simple functions like summing a range of numbers, comparing one value to another, or incrementing a counter to reach a total

I frequently forget this ability exists, because its almost always overkill, but the card filtering is insanely useful for finding a way to close the game

There are three cards which grant Retrace to spells which don't have it built in - Deeproot Historian, Six, and Wrenn and Six Because of Kindred Sorceries existing from back in the day, Deeproot Historian actually can make some Kindred spells have Retrace in addition to Merfolk and Druid permanents

Its hard to quantify an answer to that question, but Id guess that Gray Merchant of Asphodel is in the top five black game-enders ever