You can use gift code to get free langrisser item such as free trinity voucer, free crystal etc. There is different way to redeem langrisser codes depend on your device
How to use langrisser codes for Android User
Open your profile on the left corner
Click Redeem Code and input your code
How to use langrisser codes for iOS user
Open langrisser mobile official site https://langrisser.zlongame.com/hd/201811/gift_code/index.html
Input your server name, id(you can see your id by tap on your game profile and you will see your id( long sequence of numbers) ) and gift code then click redeem
Check langrisser gift code here >https://sayapusing.com/category/game/
How to redeem code for langrisser sea version
Langrisser Official
Facebook : https://www.facebook.com/pg/LangrisserEN/about/?ref=page_internal
Official website : https://langrisser.zlongame.com/
Instagram: https://www.instagram.com/langrisser_en/
Discord: https://discord.gg/dV4hKaq
Youtube Channel: https://www.youtube.com/c/ZlongameOfficialChannel