Mizzix of the Izmagnus | Mystic Retrieval | Runic Repetition

(and one other card)

You have at least two experience counters.
Lands you control can tap to produce at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) .

Activate all mana-producing lands you control by tapping them, adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) .
Cast
Turnabout by paying ({U} magic symbol) ({U} magic symbol) .
If you have fewer than three experience counters,
Mizzix of the Izmagnus triggers, causing you to get an experience counter.
Resolve
Turnabout, untapping all lands you control.
Cast
Mystic Retrieval by paying ({U} magic symbol) , returning
Turnabout from your graveyard to your hand.
Cast
Mystic Retrieval from your graveyard for its flashback cost by paying ({R} magic symbol) , returning
Runic Repetition from your graveyard to your hand and exiling
Mystic Retrieval.
Cast
Runic Repetition by paying ({U} magic symbol) , returning
Mystic Retrieval from exile to your hand.
Repeat.
If lands you control can tap to produce at least ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) , this combo nets infinite mana.