Our two-bird 3 star strategy for Ragnahog level 20 is shown in the video below.
Send Big Red just under the wreath to the bouncy pad below. He’ll bounce like a Bumble right back into the wreath, smashing it to smithereens. Next, send Stella to arc through the pig with the winged helmet and into the left side of the central structure up top. Let her settle down into the gap and self-activate by the bottom of the supports. For the pigs, it is a “Rain of Terror” as the the debris comes crashing down, finishing off the level. The score in the video is 127520.