Is this safe? Yes, we will never ask for your password. You will be redirected to the official Blizzard or Discord login screen to authenticate. You can find more information on third-party login from Blizzard here and Discord here.
Check the amount of Nightmare Dungeons you need to complete to level your Glyph to the desired level.
Leveling up a Glyph also increases its power.
At level 15 a Glyph's range in the paragon board is increased by one.
The maximum Glyph level is 21.