With the introduction of new seasons in The First Descendant, there are lots of rewards that you can claim. But not all of them come for free. Some of them cost Caliber while others can be bought with a special currency called Supply Coins. You might have come across various challenges or even store items which cost Supply Coins, but more often than not, you won't have any to spend. To help with that, here's everything you need to know about Supply Coins and how to get them in The First Descendant.