It gives your nontoken creatures the ability to tap for no mana to copy a token dork that was made this turn
Alicia Masters, Skilled Sculptor Arclight Phoenix Battle Plan Battle-Rattle Shaman Belligerent of the Ball Bespoke Battlegarb Blacksmith's Talent Blood Mist Boundary Lands Ranger Brambleguard Captain Cait Sith, Fortune Teller Chandra, Spark Hunter Chaos Dragon Chaos Terminator Lord Daring Piracy Determined Iteration Ferocification Fire Nation Turret Flamewake Phoenix Franklin Richards, Ascendant Furyblade Vampire Goblin Rabblemaster Gogo, Mysterious Mime Haradrim Spearmaster Harried Dronesmith Hazoret's Favor Hot Pursuit Howlsquad Heavy Human Torch Iroh, Dragon of the West Knight Rampager Legion Warboss Living Lightning, Charged Up Loyal Apprentice Luke Cage, Hero for Hire Manifold Mouse Might Makes Right Mirage Phalanx Molecular Modifier Mount Velus Manticore Okaun, Eye of Chaos Old Hob, Alleycat Blues Overclocked Electromancer Raging Battle Mouse Reckless Stormseeker Rionya, Fire Dancer Sidequest: Play Blitzball Siege-Gang Lieutenant Sokenzan Smelter Stand or Fall Storm-Charged Slasher Territorial Hellkite Umaro, Raging Yeti Urabrask's Forge Valduk, Keeper of the Flame Valor Singer Warren Torchmaster
By giving them +2/+2 and lifelink and vigilance, they all become a source of fantastic life gain, to ensure you're not going to be taken out of the game quickly.
The graveyard mechanic payoffs here are Tainted Indulgence and Aven Heartstabber
