Have masked dragon attacked and sent to the graveyard to special summon armed dragon lv3 - special summon armed dragon lv5 on next turn. From there, you can either attack a monster use level up! to special summon armed dragon lv7. Gold Sarcophagus is used to search out armed dragon lv10 if you don't have it in your hand already.
Use Assault Wyvern to bring out Horus the black flame dragon lv6, destroy a monster and bring out horus the black flame dragon lv8.
Use Dread Dragon to search out armed dragon lv3 or masked dragon, depending on your hand or the field.