Cast Ancestral Recall by paying {U}.
Holding priority, activate a mana-producing permanent by tapping it, adding {R}.
Activate the creature with Dual Casting attached by paying {R} and tapping it, copying Ancestral Recall.
Resolve the copy of Ancestral Recall, causing you to draw three cards.
Activate Mind over Matter twice by discarding two cards, untapping the mana-producing permanent and the creature with Dual Casting attached.
Repeat from step 2.

Infinite draw triggers

Infinite looting

Infinite self-discard triggers

Near-infinite card draw

Near-infinite magecraft triggers

Near-infinite mana permanents you control can produce

Near-infinite untap of permanents you control

Ancestral Recall

Dual Casting

Mind Over Matter

Combos with "Ancestral Recall"