Guild Coins are currencies in AFK Arena. These are coins you can earn in Team Hunting or as a possible reward in the Wrizz battle in Arcane Labyrinth. You can spend them in the Guild Store to buy yourself gear or mythic buffs. Guild coins are bound to each player and will not be recalled when leaving a guild.
You can hunt Wrizz daily and Soren (with 9000 activity points) in order to obtain guild coins. With your participation in team hunting, you will earn rewards. The team hunt rewards will eventually arrive in your mail at the end of the events containing additional Gold and Guild Coins.
Saving your guild coins can be a good way to obtain higher tier gear. Starting on 21-4, when the shop has been refreshed, players have an opportunity to buy Mythic T1 buffs and on Chapter 26 Mythic T2 buffs to strengthen mythic gears.