Varragoth, Bloodsky Sire + Timesifter + Eldrazi Displacer + Riftsweeper + Draco

Varragoth, Bloodsky Sire

Timesifter

Eldrazi Displacer

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 Eldrazi Displacer by paying 2C, blinking Riftsweeper.
5. Riftsweeper enters the battlefield, shuffling Draco from exile into your library.
6. Repeat.