The Charging Into Darkness Faction Box will provide you with all the Crystal Elf support you need to wage your own war against the undead! Containing +300% value of Crystal Elf cards, including the studious High-Mage Leiliel and 2 exclusive Crystal Elf cosmetics.

Free to keep when you get it before 3 Jun @ 6:00am

Source: Save 100% on Minion Masters – Charging Into Darkness on Steam