This card is extremely effective in a pure Fabled build, as you often run use up many cards in your hand and can give you a slight advantage in the first few turns.
Use this card with "Fabled Gallabas" to destroy most monsters on the field.
Using multiple copies of this card, you can create monsters with very high ATK. It can make almost any Fabled Monster able to destroy most monsters on the field. "Inferno Reckless Summon" can be used to summon other "Fabled Urustos".
You can also use cards like "Luminous Spark" and "Solidarity" (in a all-Fiend-Type Deck) to power up your Fabled monsters even more.