herald cards yugioh YU-GI-OH! - of Ultimateness (MP15-EN157) - Mega Pack 2015 - 1st Edition Listed cards may have imperfections. My Herald Yugioh Deck Profile

The most common and likely most powerful version is some blend of the Dimir and Rakdos example decks here

Good luck hunting them all down

Some other defender creatures can also serve as payoffs, like Coral Colony and Doorkeeper, which mill your opponent, or Blight Pile, which attacks their life points directly

Brimaz, King of OreskosBrimaz, King of Oreskos Speaking of token creation, this 3/4 for was a frightening presence in Born of the Gods limited play when it released and it is still a flavorful and strong card in the 99 of a Cat Commander deck

However, if you want a guideline for what kind of cards to look out for, it's good to refer to the Limited archetypes available