My buddy and I found this underground cellar in Cyseal that contains a puzzle with 4 plates you can press next to pillars. The writing near-by says Fire, Wind, Earth, Water and some stuff about meeting Double bla bla.

I don't want a solution at all and I don't want to read a walk-through about it either. No hints! I want just one single answer - is anything needed to complete that quest, like an item, or weapon, or some NPC, or some external force at all? A spell maybe? Or can it be actually solved by simply pressing those 4 plates in some specific order?

The best I could figure based on what was written was that one player needed to press Fire, while the other needed to press Water, and then do the same with Earth and Wind or vice versa because pressing one of the plates leaves players feeling good about it. That was probably the first plate player 1 had to press, following by player 2 pressing the opposite of that pillar. Anyway - no spoilers! I just want to know if it can be done simply by pressing those big plates.