This is an Exodia Mage deck which was built for heroic-mode Sapphiron.

HOW TO PLAY THE COMBO

Step 1: Play Emperor Thaurissan while having 4 out of 5 exodia pieces on your hand (Archmage Antonidas, 2x Sorcerer's Apprentice, 2x Molten Reflection )

Step 2: When you have "5 exodia pieces", play Archmage Antonidas 

Step 3: Play 2x Sorcerer's Apprentice

Step 4: Cast 2x Molten Reflection on Sorcerer's Apprentice

Step 5: Cast an infinite number of 0-mana Fireballs on Sapphiron's face

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The other cards in this deck will help you stall until you gather all the needed cards.