Flash + Protean Hulk + Body Snatcher + Laboratory Maniac + Viscera Seer + Hapless Researcher + Hermit Druid + Torch Courier

Flash

Protean Hulk

Body Snatcher

Laboratory Maniac

Viscera Seer

Hapless Researcher

Hermit Druid

Torch Courier

How it works

1. Cast Flash, putting Protean Hulk on the battlefield, choosing not to pay and sacrificng Protean Hulk.
2. Protean Hulk's LTB triggers, searching your library for Body Snatcher, Viscera Seer and Torch Courier and putting them onto the battlefield.
3. In response to Body Snatcher's ETB trigger, activate Viscera Seer sacrificing Body Double.
4. Body Snatcher's LTB triggers, exiling Body Snatcher and returning Protean Hulk to the battlefield.
5. Resolve the Viscera Seer ability, scrying 1.
6. Resolve the Body Snatcher ETB, failing to discard a card.
7. Activate Viscera Seer, sacrificing Protean Hulk, searching your library for Laboratory Maniac, Hermit Druid and Hapless Researcher, then putting them onto the battlefield.
8. Activate Torch Courier, sacrificing itself and giving Hermit Druid haste.
9. Activate Hermit Druid, milling your library.
10. Activate Hapless Researcher, winning the game.