Glyph of Warding: Thunder
From bg3.wiki
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. This variant of the spell allows spellcasters to inscribe a ward that explodes and deals Thunder damage to enemies when triggered.
Description
The glyph explodes, dealing 
damage to enemies in the vicinity. Creatures who pass the 
Dexterity saving throw still take half damage.
Only one glyph can be active at a time.
Properties
- Cost
Action + 
Level 3 Spell Slot
- Damage: 5~40
- Details
- DEX Save
Range: 9 m / 30 ft
AoE: 4 m / 13 ft (Radius)
5d8
At higher levels
Upcasting: Casting this spell at a higher level deals an extra 1d8 damage for each spell slot level above 3rd.How to learn
This spell is a variation of:
Notes
- Only those considered an enemy can trigger the glyph. For the player's party this is indicated via a red circle beneath the creature, red outlines when highlighted, and denoted by a red dot on the minimap. Neutral, friendly, and allied creatures (highlighted yellow/green/blue respectively) can safely go through the glyph.
- This makes using the glyph as a trap difficult for many encounters. Specifically, those that normally only consider creatures hostile after dialogue.
- When the glyph is triggered, everyone within the area is affected, regardless of allegiance.
