Basic Trope: A weapon/device/procedure which seems incredibly powerful/game-breaking at first, but has detrimental issues that limit its long term usefulness.
Straight: The best Combination Attack needs all five members to perform it. It's awkward getting the Olympus Mons needed to pull it off, and it has the Mighty Glacier going first, meaning the enemy gets a turn during the setup.
Exaggerated: Alice's BFG creates a laser the size of the Moon. But to do that, it takes enough energy to black out a whole city. Furthermore, the thing can onlybe used once.
Downplayed: Alice's BFG is powerful, but takes a long time to reload.
Of course a BFG would need that much energy.
Alice gets caught up in a crisis and needs a gun, but the only one available is a prototype that doesn't have all the kinks worked out yet.