Mulligans
Step 1: Get 2 ticks of Thaurissan (either through Echo #1 or survival)
Step 2: Play your Archmage Antonidas and Sorcrer’s Apprentices (5 mana)
Step 3: Play Echo of Medivh (0 mana because of Apprentices)
Step 4: Play your 2 extra Apprentices (4 mana, 9 total)
Step 5: Play your newly acquired Fireball for 0 mana and win the game!