mtg command cards the Dreadhorde – THE ART OF DAARKEN then draws that many cards. Mishra's Command (Card) | EDHREC

You can re-use these spells every attack, keeping your hand full while swinging in wth Chun-Li without having to worry about blockers

(8/7/2020) If you cast a spell "without paying its mana cost," you can't choose to cast it for any alternative costs

The decking rule helped keep the long games from running any longer

The only question left: What happens when a player loses in a game of Planechase

You could toss into an equipment brew that includes this to fetch out an equipment and drop it for free with a cost of 4 or less or an enabler

As for the primary theme, topdeck manipulation, this deck put it on the map