[Answered] What is this?

JF5000G

New Member
What is this I've never seen it before LOL
The Arc gives its owner an increase of rewards when contributing to other players’ Great Buildings. The piggy bank with a number represents the amount of boost that was added to your reward for contributing to friend’s Great Building.

As an example, you received a reward of 25 FPs and 25 medals for contributing to a friend’s Great Building. Your Arc will add 3 FPs and 3 medals to what you receive.