Itassis and Solaris' Ancient Mystic Mode
Yellow uses the Mystic Fighters Lion Staff Crossbow Mode
The Lion Staff Crossbow Mode is what seemingly destroys Oculous however in reality that just causes him to return to his Giant form.
Manticore Megazord uses its Legend Striker and attacks Oculous with it which causes the sparks that are coming from Oculous
The Finisher in which the Manticore Megazord's Legend Striker spins and then unleashes a Fire attack is what destroys Cyclops/Oculous.