There are 4 humans who are Gorma beings who can combine together in order to form a 4-Headed Monster, here's the shot of the Monster and close-up shots of all 4 of his faces however the shot of the monster shows other characters in the background. The monster grows immediately. The Rangers call for their Beasts. "MegaTigerzord" forms immediately. Red Dragon WM (Warrior Mode) also forms so it's Red Dragon WM and Mega Tigerzord against Fourhead.
Red Dragon WM tries attacking Fourhead with its Staff.
Mega Tigerzord tries attacking Fourhead with its Firebird hand/arm.
Mega Tigerzord's Firebird Finisher destroys Fourhead.
However in a following scene, the Gorma beings who make up Fourhead have been brought back somehow.

Here are shots of the Crystal that belongs to Kameo.