Cast Ghostly Flicker, targeting Mnemonic Wall and Peregrine Drake. Wall returns the Flicker to your hand, and Drake untaps more mana than the Flicker costs, so you can float infinite mana doing this.

With the infinite mana, you can start Flickering the Wall plus something else infinite times. Mulldrifter, Sea Gate Oracle, or Prophetic Prism to draw your whole deck, for example.

Replace Wall with Archaeomancer if you wish.

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Cast ghostly flicker, on the drake and something like mnemonic wall. The result is that you made more mana by spending 3 and untapping 5, returning ghostly flicker back to your hand with the wall, so you can repeat to get any amount of mana. That's the general combo.