Crystal Pylons are ancient constructions in Un'Goro Crater which can be used to exchange , s , s and s for useful consumables. s
In order to make the pylons generally available, the quests  ω τ ϖ and  ω τ ϖ must be completed. The latter grants you with , which details what crystal recipes are available and from which pylon.
Each recipe creates 6 consumables and requires 10 units of each of two different colors of Power Crystals as follows:
See also: Power crystals.