Ghostly Flicker + Lithoform Engine + Dreamstone Hedron

Ghostly Flicker

Lithoform Engine

Dreamstone Hedron

How it works

1. Cast Ghostly Flicker by paying 2, targeting any two permanents.
2. Holding priority, activate Dreamstone Hedron by tapping it, adding 3.
3. Activate Lithoform Engine's second ability by paying 3 and tapping it, copying Ghostly Flicker, with the copy targeting Dreamstone Hedron and Lithoform Engine.
4. Resolve the copy of Ghostly Flicker, blinking Dreamstone Hedron and Lithoform Engine.
5. Repeat from step 2.