Cards like Hero of Iroas, Danitha Capashen, Paragon, and Jukai Naturalist help you cast plenty of auras
What makes Shroofus such a blast to build and play is that he turns anthems and pump spells into board presence with nearly unparalleled speed one-mana acceleration like Llanowar Elves or Elvish Mystic can have you attacking with Shroofus on turn 3 before most players have blockers and then every Saproling token that connects afterward only adds to the growing swarm
Here's a sample around $50: Using dual lands we now have faster, mana-fixing ramp like Skyshroud Claim, and mana-fixing fetches like the Mirage block fetchlands (Rocky Tar Pit)
Pain for All, another new Edge of Eternities card, can create a similar combo
For instance, you can't run both SpongeBob SquarePants and Jodah, The Unifier in the same deck