Start game with leyline and caverns out. Exile an island to caverns.
Exile sprit guide and tap caverns to cast flash to bring out Academy Rector. Since you are out of mana, Academy Rector dies. Is the death trigger to search for and put out Omniscience.
Use omniscience to cast Enter the Infinite in order to draw your deck including Emrakul, the aeons torn and lava axe. Cast both.
Start your extra turn with Emrakul out and your opponent at 15 life. Swing for kill.
Start game with leyline and caverns out. Exile an island to caverns.
Exile sprit guide and tap caverns to cast flash to bring out Academy Rector. Since you are out of mana, Academy Rector dies. Is the death trigger to search for and put out Omniscience.
Use omniscience to cast Enter the Infinite in order to draw your deck including Emrakul, the aeons torn and lava axe. Cast both.
Start your extra turn with Emrakul out and your opponent at 15 life. Swing for kill.