How do I earn crystals?

I have been playing Hero Siege for roughly two hours and my blue crystals are building up, but I don't understand how.

Is there anything specific that awards these crystals?

Blue Crystals

hero-siege

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Quick Answer about "How do I earn crystals?"

In battle: By collecting the “1000 crystals” boxes that can fall any time the battle fund increases by 1 crystal. ...

By Fighting in a battle until its end. ...

In daily bonuses.

Another way to earn crystals is referrals. ...

You can get crystals by taking part in contests. ...

Crystals can be bought.

How do you get crystals fast in Honkai?

How to Get Free Crystals or Gems in Cookie Run Kingdom?

Get them from the main game story as bonuses for the completion of quests.

Type in a CRK redeem code.

Getting them from your Mailbox \u2013 Check it daily!

Clear World Exploration Stages for the first time.

How do you farm crystals in Lost Ark?

Royal crystal has to be purchased with real money, to the best of my knowledge. Gold can be obtained by various ways in game other than directly purchasing with royal crystal: completing certain quests, finishing certain collectibles, playing the AH buy low and sell high etc.

How to Grow Your Own Crystals at Home

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