Skittering Krasis

Whenever you cast Skittering Krasis from anywhere outside the battlefield, you may pay {g/u}. If you do, you may experiment with Skittering Krasis.
When Skittering Krasis enters the battlefield, if it was experimented with, choose up to two creatures you control. As long as Skittering Krasis is on the battlefield, the chosen creatures can't be blocked.
"Something went missing. Scratch that, a lot of things went missing..."
-Matthias, Gyre Biomancer