Activate Seal of Removal by sacrificing it, returning Lotus-Eye Mystics to your hand.
Cast Lotus-Eye Mystics by paying {4}.
When Lotus-Eye Mystics enters the battlefield, it and Mana Echoes trigger.
Resolve the Lotus-Eye Mystics trigger, returning Seal of Removal from your graveyard to your hand.
Resolve the Mana Echoes trigger, adding at least {5}.
Cast Seal of Removal by paying {1}.
Repeat.
If you control six or more Humans and/or Monks, this combo nets infinite mana.

Infinite colored mana

Infinite colorless mana

Infinite ETB

Infinite LTB

Infinite storm count

Mana Echoes

Seal of Removal

Lotus-Eye Mystics

Chromatic Orrery

Mycosynth Lattice

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