Chulane triggers, causing you to draw a card and allowing you to put a land card from your hand onto the battlefield.
When Sky Hussar enters the battlefield, it triggers, untapping all creatures you control.
Activate Chulane by paying ({3} magic symbol) and tapping it, returning Sky Hussar to your hand from the battlefield.
Repeat.
If you control a black permanent, red permanent, an additional mana-producing creature, and/or at least one additional Elf, this combo nets infinite mana.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite ETB.
Near-infinite landfall triggers.
Near-infinite LTB.
Near-infinite mana creatures you control can produce.
Near-infinite storm count.
Near-infinite untap of creatures you control.
Put all lands from your hand and library onto the battlefield.