You have an Island, Pirate or Vehicle card in hand.
Steps
Activate
Mary Read and Anne Bonny by tapping it, causing you to draw a card and then discard an Island, Pirate or Vehicle card.
The discarded card is put on top of your library instead of into your graveyard due to
Library of Leng.
Mary Read and Anne Bonny triggers, creating a tapped Treasure token.
When the Treasure enters the battlefield,
Quicksmith Genius triggers, causing you to discard an Island, Pirate or Vehicle card. The discarded card is put on top of your library instead of into your graveyard due to
Library of Leng. Afterwards, draw a card.
Repeat from step 3.
Results
Infinite artifact ETB.
Infinite artifact tokens.
Infinite draw triggers.
Infinite self-discard triggers.
Infinite tapped Treasure tokens.
Metadata
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
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1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.