Mana is used to unlock nodes on a Mana Circle, which is where characters can unlock stat boosts, new abilities, and other useful perks. Mana can be obtained through completing quests, Item Summoning, Endeavor rewards, and the Dragon's Roost, among other methods.
Mana can also be obtained through a helper bonus when a player selects another player's helper to go on quests at a rate of 50 per friend and 25 per non-friend, which is granted immediately upon completing the quest. The player who owns the helper will then accumulate Mana at a rate of 20 per friend and 10 per non-friend for a maximum cap of 1,000 Mana, which is granted the next day in the goodie box.
The calculator below can be used to calculate friend and non-friend usage. The number of users can be found in the goodie box history details.