It's a literal "Effect" in the effects menu!
Click on the sprite you want to warp. Look at the left-side panel. Find "Effects" under "Add/Edit". Click dat. Then Add New Effect (just like adding a behavior from here). Find the Radial warp. Play with the effect settings in the left panel until you get what you want. You may also consider other effects (try some out) and add a rotation to it in the event editor. Best of luck!