Laboratory Maniac + Phyrexian Devourer

Prerequisites

• You have a way to draw a card.

Steps

1. 1Activate Phyrexian Devourer by exiling the top card of your library.
2. 2Repeat step 1 until you have an empty library.
3. 3Resolve a Phyrexian Devourer ability, putting a number of +1/+1 counters on it equal to the exiled card's mana value.
4. 4If Phyrexian Devourer has a power of at least seven, it triggers, causing you to sacrifice it.
5. 5Repeat steps 3-4 until you sacrifice Phyrexian Devourer, thus causing all remaining Phyrexian Devourer abilities to fail to resolve due to having no legal targets.
6. 6Draw a card, causing you to win the game due to drawing from an empty library.

Effects

• Exile your library
• Win the game