With the exception of Commander and Brawl, which each have a maximum (and minimum) deck size of 100, your deck has no maximum hand size
4 Selvalas Stampede Selvala has always been about the greater good, and this card is a nice chance for them to benefit a bit from that
For the sake of simplicity, lets call all of these cards "cyclers" (that all can be cycled), and my selections meet the criteria of either a) costing a single mana to discard, b) providing additional value when cycled, or c) ideally both: Greater TanukiGreater Tanuki, Altanak, the Thrice-CalledAltanak, the Thrice-Called, and Shefet MonitorShefet Monitor serve as ramp sources, while Generous EntGenerous Ent, Eagles of the NorthEagles of the North, and Spinewoods ArmadilloSpinewoods Armadillo can help with hitting land drops
Yore-Tiller Nephilim Reanimator strategies are always fun for me, and Yore-Tiller Nephilim lends itself to a unique combat-centric approach instead of straight reanimation
Well, it will feel that way
PSA 10 rates 25-35% on modern card stock