Activate Eldrazi Displacer by paying {2}{C}, blinking Eyeless Watcher.
When Eyeless Watcher enters the battlefield, it triggers, creating four 1/1 Eldrazi Scion creature tokens.
Activate three Eldrazi Scions by sacrificing them, adding {C}{C}{C}.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite colorless mana

Infinite creature tokens

Infinite blinking of most creatures

Eldrazi Displacer

Eyeless Watcher

Parallel Lives

Activate Emiel the Blessed by paying {3}, blinking Eyeless Watcher.
When Eyeless Watcher enters the battlefield, it triggers, creating four 1/1 Eldrazi Scion creature tokens.
Activate three Eldrazi Scions by sacrificing them, adding {C}{C}{C}.
Repeat.

Infinite blinking

Emiel the Blessed

Activate Eldrazi Displacer's ability by paying {C}, blinking Eyeless Watcher.
Eyeless Watcher enters the battlefield tapped, triggering itself, creating two 1/1 Eldrazi Scion tokens.
Activate an Eldrazi Scion by sacrificing it, adding {C}.
Repeat.
Once you have infinite Eldrazi Scion tokens, you may activate any number of them.

Training Grounds

Activate Eldrazi Displacer by paying {C}, blinking Eyeless Watcher.
Eyeless Watcher enters the battlefield, creating two 1/1 colorless Eldrazi Scion tokens.
Activate Eldrazi Scion by sacrificing it, adding {C}.
Repeat.

Biomancer's Familiar

Activate Eldrazi Displacer by paying {C}, blinking Eyeless Watcher.
Eyeless Watcher enters the battlefield, creating three 1/1 Eldrazi Scion creature tokens.
Activate an Eldrazi Scion by sacrificing it, adding {C}.
Repeat.

Combos with "Eyeless Watcher"