Guild members can make a Card Request in the Guild Chat. Guild members contribute Guild Fragments by selecting the ‘Give’ button next to the request. A player's Guild Fragment balance can be seen towards the upper-right of the ‘Chat’ tab.
A Guild member can only contribute 10 Fragments towards a request at a time. There is a cooldown period before a player can contribute to the same request, though a single player can contribute to more than one request at a time.
Once a Card Request has been fulfilled, the requesting player will receive the number of Card Pieced indicated on the request; this is usually ten for Common Cards, and one for Rare Cards. Card Requests cannot be made for Epic or Legendary Cards.