Feather/Hero of Precinct One build.
Uses targeting instants/sorceries to trigger Feather, almost all of them being hybrid mana split cards from Ravnica, which means they also trigger Hero.
Creatures:
Feather, the Redeemed - The build around, insane card advantage if it sticks around
Hero of Precinct One - Great synergy with this build, clogs the board with tokens
Tenth District Legionnaire - Ideal Feather target, scry is huge when you inevitably reach topdeck mode
Krenko Tin Street Kingpin - Another excellent token generator, overall great card that draws attention
Spells:
Assure // Assemble - Pumps, indestructible protects from removal
Defiant Strike - Cantrip effect
Depose // Deploy - Can be used on your own creatures post-combat as another Featherable cantrip, otherwise can tap down a guy precombat
Integrity // Intervention - Run of the mill pump spell, the only split card that has two castable modes, opens up a bad Lightning Helix option in a pinch
Thrash // Threat - One-sided fight effect, more in the sideboard for creature-based matchups
Unbreakable Formation - Protection from removal, able to pump the board precombat and use them tokens
Angelic Exaltation - Excellent synergy with Krenko and Hero
Sideboard:
Cosmotronic Wave - Removal for token-based strategies
Justice Strike - Great removal spell for most targets
Lava Coil - Good old fashioned removal
Revival // Revenge - Able to return any creature in our deck that happens to die
Thrash // Threat - See above
Aurelia, Exemplar of Justice is also a consideration. Allows the ability to go over the top with trample. Looking into what could be cut.
Let me know how it smells!