Youll have to make your opponents lose life, but in Commander games its fairly easy to deal 1 damage to each player, and thus your spells with mana value 3 or less gain cascade
"My 61st card draws a card, so it's the same thing as playing 60 cards except I get an extra spell." Well, not really
Minamo Scrollkeeper, Trusted Advisor, Doctor Octopus, Master Planner, Cecily, Haunted Mage/Eleven, the Mage, and Twenty-Toed Toad each increase your maximum hand size to a specific amount and might fit your deck's plan
Scytheclaw Raptor forces players to play at sorcery speed (lest they take four damage per spell), Giant Cindermaw shuts down lifegain, and Kinjallis Sunwing forces foes creatures to enter the battlefield tapped
Something incredibly right
Behind Cynthia is a big stadium screen with a close-up view of her face