Green times and crystals

Can you get green maps from the shop?

Crystals can’t figure out what ones I can use on what tiems every time I try to use one it tells me can’t be used on this item.

U must be trying to use them on eternal items. An only a few can you use on them.

I’m not sure how the whole crystal thing works yet. I’m trying to figure It out but also don’t want to waist my good ones I finally have at lest one of each now.