Crafting: what drops crystals?

[cowell16]

I've fought everything and can't think of what would drop crystals unless it's a rare drop from things that drop crystal crumbs.

 

[Axel]

Guardians, The enemy that switches colors. (Purple, blue and green)

 

[cowell16]

thanks, I thought as much, but had just been getting crumbs from them.

 

[MrChocodemon]

Crystals are very rare. After an hour of farming i had ca. 2-3 crystals.
Sometimes you're lucky and sometimes you're me.

 

[Purrbidden]

Yep, crystals are hard to come by. ..Well with my luck, I didn't get very many, despite farming for maybe an hour like @MrChocodemon did. ;u;

 

[Jyntax]

I farmed them at the room on the flying fortress when you enter it and leave the first room to the left. There are those 4 "Teleport"Platforms which send you to 2 guardians, 1 wimp, 1 bird and 1 of those robots. You can just take down all of them, leave the screen and go back in.

This way you can also farm the Attackspeed Armor of the Robots and the Cards of all 4 Monsters at the same time.
Farmed 3 for me and 2 for my girlfriend there in like 30 Minutes + 2 of the Attackspeed Armors.

EDIT: Used a ShadowClone Build with much Attackspeed and Critrate. So my Killspeed was insane.

 

[GarlicJelly]

Best way to farm the Brawler Bots is to farm the very first room that you enter, there is two Brawler Bots and a big space in the middle. You all know which room I'm talking about. ^^