Dimir Aqueduct from your hand onto the battlefield, and then repeat this process once if you control eight or more lands, putting any other land from your hand onto the battlefield instead.
When
Dimir Aqueduct enters the battlefield, it,
Bloodghast and
Retreat to Coralhelm trigger.
Resolve the
Dimir Aqueduct trigger, returning it from the battlefield to your hand.
Resolve the
Bloodghast trigger, returning it from your graveyard to the battlefield.
Resolve the
Retreat to Coralhelm trigger, untapping
Zimone and Dina.
Repeat.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite death triggers.
Near-infinite ETB.
Near-infinite landfall triggers.
Near-infinite LTB.
Near-infinite sacrifice triggers.
Put all lands from your hand and library onto the battlefield.