Power Rangers: Season 8, Episode 38

8 - 38: Rise of the Super Demons (2)

When testing the new Lifeforce Megazord, The Rangers find that their life-energy is taxed by using it, and question whenever or not the Zord should be utilized. Meanwhile, Olympius and an enslaved Diabolico both attack Mariner Bay, gaining incredible power, and taking the Rangers Zords to their limits, forcing the necessity of the dangerous Lifeforce Megazord