In Orzhov colors, this is very easy to accomplish, and you can kill your own Phyrexians for value
Because it digs more, recurs an instant/sorcery, and can untap your own stuff, I prefer this card over the normal Cryptic Command
Windfall makes everyone discard their hand and then draw cards equal to the greatest number of cards discarded, making it perfect for multiplayer formats like Commander
Zethi, Arcane Blademaster If you look on the EDHREC page for Zethi, a lot of the instants listed are already pretty efficient, but I think it makes more sense to add more expensive and impactful instants instead of copying Opt or Curate
6 Salazzle A Solid Attack For Two Energy Salazzle may not be the toughest Pokemon on the block, but at least it does a consistent 60 damage for two Energy
Consider putting this in a deck with a bunch of zero mana Kobolds and watch yourself churn through your deck