Varragoth, Bloodsky Sire + Timesifter + Emiel the Blessed + Riftsweeper + Draco

Varragoth, Bloodsky Sire

Timesifter

Emiel the Blessed

Riftsweeper

Draco

How it works

1. Declare Varragoth as an attacker.
2. Activate Varragoth by paying 1, 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 3, blinking Riftsweeper.
5. Riftsweeper enters the battlefield, shuffling Draco from exile into your library.
6. Repeat.