Once you have your first, you'll also unlock Sigil crafting with the Occultist in Kyovashad – which is important later, as you'll be able to use Sigil Powder to create Nightmare Sigils with higher Tiers. The higher the tier the more difficult the dungeon, but the higher the chance that you'll loot more Glyphs as you hack and slash through hundreds of monsters.

In the middle of your first Paragon Board is an empty Glyph socket. But before you can socket one of your Glyphs you'll first need to reach it, which you'll need to do by investing the necessary Paragon Points into other nodes, creating an unlock path.

Just to recap here: Glyphs can be socketed into a special slot on the Paragon Board to modify the stats of the surrounding nodes in a three-square radius. Any nodes within this boundary will see some form of benefit; be it an improvement to a base stat (Dexterity, Intelligence, Strength, Willpower), a secondary effect, or other useful passive enhancement. For example, in my best Diablo 4 Necromancer build I was able to use a rare Necromancer Glyph which added a +4 damage bonus to my Skeletal Warriors and improved the Intelligence buff of the nodes surrounding it.

Rare glyphs often come with other fixed bonuses too, which unlock when certain stat requirements are met. For example, a Glyph may ask you to reach a total intelligence of 300, which would then increase your critical strike damage by 10% after casting an offensive spell.

At this stage of the game, you should have some degree of understanding about your class and build's particular strengths and weaknesses, and you'll want to use Glyphs to play to these. Try to place a Glyph where its bonus will stack the highest relevant upgrades within the largest radius possible, allowing you to improve in key disciplines quickly.

If you really want to storm through the endgame, you should begin to focus on upgrading your Glyphs to level 15 as quickly as possible. Every Glyph in the game has a base level which you can increase – buffing the stat attributes and the radius of effect for its bonuses on the Paragon Board. The thing is, you can only upgrade a Glyph at the end of a Nightmare Dungeon.
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