Board Thread:Questions and Answers/@comment-28100493-20160507151712/@comment-26447088-20160507174923

Crowns are generally given out in events through point rewards, exchange rewards (such as from the Eliffer event we just finished) or quest clear rewards.

For AP/BP pots, I'd highly recommend against using Crowns to buy them. Crowns are better off used to pull packs most of the time, if not all the time. You can max loyalty units that are 3* or higher to sell for medals to exchange for AP/BP in the Medal page. Bronze and Silver summons come quite easily, so you can replenish your supply of units to medal by pulling them. You can also get some daily from the Nightmare Rift by exchanging runes.