"Heroic - Champion Excalibur" and "Heroic Challenger - Spartan"
"Heroic" (ヒロイック Hiroikku) is an archetype used by Nistro in the Yu-Gi-Oh! ZEXAL anime. It involves Warrior-Type monsters with effects that allow them to get stronger that involve original ATKs. Their team symbol is a crimson Phoenix, which also symbolizes the never-dying fighting spirit within this archetype's user Nistro.
The "Heroic" archetype is easily discerned from others by their ability to create monsters with extremely high attack without any need of a previous setup to reach this. That does not mean that is the only tactic at their disposal. A large number of "Heroic" cards also have effects that stop your opponent utilizing low-level special summons and defensive tactics, prevent your opponent from destroying yours by battle and even cause your opponent to suffer equally from attacks where they would usually win.