Magia Chip is one of the currencies.
It can be obtained by completing quests in Another Story Quests, Magical Girl Story Quests, Events. It can be also a reward for Login Bonus and Missions.
It's possible to buy Magia Chips in the shop in exchange of Mirrors Coin or an Event currency
There is a Magia Chip Shop where you can exchange your chips for 4 ★ Akemi Homura (Megane ver.) and Magical Girls' destiny gems.