We have integrated a referral system for Nightmare!
Only players who do not have an account can be sponsored, the sponsorship system will give you the opportunity to receive 100 Blood Runes as a reward as soon as a character from the sponsored account reaches level 40!
To invite your friends, go to the "My Characters" page by clicking on the "My Characters" button when you are connected to the Nightmare website.
Send your unique referral link at the bottom of the page to your friends. Once a sponsored account has been registered through that link and leveled a character up to level 40 you will be able to redeem your rewards! If you have any problems with the referral system, let us know on our discord server in the bug reports section!
-Nightmare development Team