Colors and Card Draw Blue is by far the easiest color for card draw
Add Arena Tutor to easily track when you have four of a card in your collection
For example, if you control Hama Pashar, Ruin Seeker
While that doesn't do much to punish a deck like Azorius Control, which gets most of its card advantage from spells that simply pop cards into players' hands like Stock Up and Consult the Star Charts, it's great against the best Standard/MTG Arena deck of the moment - Izzet Cauldron
7 The Mindskinner Mill Monster An unblockable commander makes for a unique problem for your opponents, coupled with the fact that The Mindskinner has a unique ability and that most of their deck is going to end up milled in their graveyard, making it a neat casual commander to bring out
Obviously, in any Flubs, the Fool deck you're trying to remain hellbent as long as possible to rattle off cards from the top of your library