Activate Hermit Druid by paying {G} and tapping it, reveal cards from the top of your library and then putting them into your graveyard.
Activate Jace's first loyalty ability by putting a loyalty counter on it, causing target player to mill two and drawing you a card.
Jace triggers, winning you the game.

Win the game

Hermit Druid

Jace, Wielder of Mysteries

Cast Mana Severance by paying {1}{U}, searching for all lands in your library, exiling them and shuffling your library.
Activate Hermit Druid by paying {G} and tapping it, causing you to mill your entire library.
Activate Jace's first loyalty ability by putting a loyalty counter on it, causing target player to mill two cards and you to win the game due to drawing from an empty library.

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