Most of these creature types, such as Mouse and Rabbit, are not super well supported thus far

Abdel Adrian, Gorion's Ward Achilles Davenport Acolyte of Bahamut Agent of the Iron Throne Agent of the Shadow Thieves Ainok Strike Leader Akroma's Will Akroma's Will Alora, Merry Thief Amber Gristle O'Maul Aminatou, the Fateshifter Ancestral Communion Angelic Field Marshal Archivist of Gondor Astarion's Thirst Baeloth Barrityl, Entertainer Bane's Contingency Bastion Protector Benalish Commander Biowaste Blob Bloodsworn Steward Brotherhood Ambushers Burakos, Party Leader Candlekeep Sage Captain Vargus Wrath Chain Assassination Clan Crafter Clara Oswald Cloakwood Hermit Cloudkill Command Beacon Command Beacon Commander Greven il-Vec Commander Sofia Daguerre Commander's Insight Commander's Insignia Commander's Plate Commodore Guff Company Commander Convergence of Dominion Criminal Past Crimson Honor Guard Cultist of the Absolute Daretti, Scrap Savant Deadly Rollick Deflecting Swat Demon of Wailing Agonies Dihada, Binder of Wills Distract the Guards Dragon Cultist Drillworks Mole Drown in Dreams Dungeon Delver Durnan of the Yawning Portal Eagle Vision Echo Storm Ellyn Harbreeze, Busybody Elminster Empyrial Storm Endless Ranks of HYDRA Erinis, Gloom Stalker Escape Detection Estrid, the Masked Everett K

And "Nissa, Worldwaker" can make lands into creatures
Usually, I take the cards in Izzet, but you can do it in other ways
Probably how to do bowling or to handle a bookie job
That nicely overlaps with your game plan and result in Sorin being pretty decent and near his ceiling