Escape Protocol and Scholar of the Ages on the battlefield.
You have an instant and/or sorcery card in hand with cycling.
Nonland permanents you control can tap to produce ({3} magic symbol) ({U} magic symbol) plus enough additional mana to cycle the instant/sorcery card in hand.
Steps
Activate all nonland mana-producing permanents you control by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) plus enough mana to pay for the cycling cost of an instant/sorcery card in your hand.
Cast Dramatic Reversal by paying ({1} magic symbol) ({U} magic symbol) , untapping all nonland permanents you control.
Activate any instant/sorcery card in your hand's cycling ability by paying its cycling cost and discarding it.
Escape Protocol triggers, causing you to pay ({1} magic symbol) to blink Scholar of the Ages.
Scholar of the Ages enters the battlefield, returning Dramatic Reversal and the card with cycling from your graveyard to your hand.
Resolve the cycling ability from step 2, causing you to draw a card.
Repeat.
Results
Infinite card draw.
Infinite draw triggers.
Infinite self-discard triggers.
Near-infinite ETB.
Near-infinite LTB.
Near-infinite magecraft triggers.
Near-infinite mana nonland permanents you control can produce.