Ghostly Flicker + Lithoform Engine + Grim Monolith

Ghostly Flicker

Lithoform Engine

Grim Monolith

How it works

1. Cast Ghostly Flicker by paying 2, targeting any two permanents.
2. Holding priority, activate Grim Monolith 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 Grim Monolith and Lithoform Engine.
4. Resolve the copy of Ghostly Flicker, blinking Grim Monolith and Lithoform Engine.
5. Repeat from step 2.