Ghostly Flicker + Will Kenrith + Mnemonic Wall + Chromatic Orrery

Ghostly Flicker

Will Kenrith

Mnemonic Wall

Chromatic Orrery

How it works

1. Activate Will Kenrith's -2 ability targeting yourself, reducing the cost of your instant, sorcery, and planeswalker spells by 2 until end of turn and drawing you 2 cards.
2. Activate Chromatic Orrery's first activated ability by tapping it, adding CCCCC.
3. Cast Ghostly Flicker by paying C, targeting Chromatic Orrery and Mnemonic Wall, blinking them.
4. When Mnemonic Wall enters the battlefield, return Ghostly Flicker to you hand.
5. Repeat.
6. Once you have infinite mana, you may activate Chromatic Orrery's last ability any number of times.