Pair Perdita, Devoted Mother with some 2 cost characters that have abilities trigger when they enter play like Pinocchio, Talkative Puppet and youve got yourself an effective little recursion engine
But when you reach a point where you start pulling multiple copies of several different cards and get little that you didn't already have
Brawl Not Legal Vintage Banned Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Banned Penny Not Legal Sentinel Dispatch Conspiracy (Start the game with this conspiracy face up in the command zone.) At the beginning of the first upkeep, create a 1/1 colorless Construct artifact creature token with defender
Skullbriar has a special rule that gets around that, letting counters stay on Skullbriar when it goes to different zones
Here's a quick list of sweet tutors for under $2 that can quickly find them: Dimir Infiltrator, Muddle the Mixture, Shred Memory, Whir of Invention Fluctuator Tutors: Ethereal Usher, Netherborn Phalanx, Plea for Guidance New Perspectives Tutors: Diabolic Tutor, Dark Petition Flexible Tutors: The Payoffs We've got some powerful cards to take advantage of all our cycling: is the classic payoff card and remains my favorite of the bunch
Id add the Ravnica Signets cycle here as well, but with Signets you often lose tempo the turn they enter