You can equip this card to "Ancient Sacred Wyvern" since this card's ATK-increasing effect is based on having higher Life Points than your opponent's. So, this card can best fit with that monster.
If you have "The Agent of Force - Mars" and "Master Hyperion" on the field, as well as "The Sanctuary in the Sky", you can use the effect of "Master Hyperion" to clear the field and then equip "Cestus of Dalga" to "Master Hyperion". If you're currently tied in Life Points with your opponent, the attack of "Master Hyperion" will cause the difference to become 6400. Then the attack of "Mars" will end the game.