Requires

Varragoth, Bloodsky Sire must be on the battlefield. Timesifter must be on the battlefield. Emiel the Blessed must be on the battlefield. Riftsweeper must be on the battlefield. Draco must be in the library. Varragoth does not have summoning sickness. An opponent is unable to block and kill Varragoth. Mana needed: on your first turn, with available each extra turn

Steps

1. Declare Varragoth as an attacker.
2. Activate Varragoth by paying , searching your library for Draco, then shuffling your library and putting Draco on top of it.
3. During the next upkeep, Timesifter triggers, exiling Draco and causing you to get an extra turn after this one.
4. Activate Emiel by paying , blinking Riftsweeper.
5. Riftsweeper enters the battlefield, shuffling Draco from exile into your library.
6. Repeat.

Results