Urza, Lord Protector + The Mightstone and Weakstone + Ghostly Flicker + Mnemonic Wall

Urza, Lord Protector
The Mightstone and Weakstone
Ghostly Flicker
Mnemonic Wall

Requires
Ghostly Flicker in hand. All permanents on the battlefield. Urza, Lord Protector and The Mightstone and Weakstone melded into Urza, Planeswalker. You control a basic Island.
Steps
  1. Activate Urza, Planeswalker's first loyalty ability by putting two loyalty counters on it, causing instant spells you cast this turn to cost 2 less and causing you to gain two life
  2. Activate a basic Island by tapping it, adding u
  3. Cast Ghostly Flicker by paying u, blinking Mnemonic Wall and a basic Island
  4. Mnemonic Wall enters the battlefield, returning Ghostly Flicker from your graveyard to your hand
  5. Repeat from step 2
Results
Infinite ETB. Infinite LTB. Infinite storm count. Infinite magecraft triggers. Infinite landfall triggers.