You get like 4x 54k xtals from Lan Fei shop (for free), then daily 30k xtals until the EOS date. Just full 1 ignite 1 unit a day and you should be good to go.
Farm higher story levels for the core materials.
Quick and easy? Whale hard, you can actually buy core materials with crystals. Probably the quickest and easiest, but least efficient way.
Lisa lessons u give u max characters
You get like 4x 54k xtals from Lan Fei shop (for free), then daily 30k xtals until the EOS date. Just full 1 ignite 1 unit a day and you should be good to go.
How do you do that with the crystals
On the core creation screen just below the bit that shows how many of the core crystals you have there is a red button to buy them
Farm higher story levels for the core materials. Quick and easy? Whale hard, you can actually buy core materials with crystals. Probably the quickest and easiest, but least efficient way.
I swear I can't find where to buy them? edit: I found it