Daggerthorn Briar
Level 7 Obstacle
XP 300

Found in deep woods and in the Feywild, daggerthorn briar is a bloodthirsty plant that some hard-hearted nobles use to guard the grounds of their villas.

Hazard: A single briar patch of daggerthorn fills 10 contiguous squares, turning them into difficult terrain.Perception     No check is necessary to notice the briars.Nature     DC 24: The character identifies the patch as daggerthorn briar.TriggerThe briars attack when a creature enters or begins its turn in or adjacent to a square of daggerthorn briar.AttackOpportunity Action      Melee
Target: Creature in or adjacent to briarAttack: +12 vs. ACHit: 2d10 + 5 damage and immobilized until escape. The attack deals 3d10 + 5 damage if the target is bloodied.Countermeasures     Acrobatics DC 20 or Athletics DC 20: Immobilized characters can use a successful check to free themselves.
     A character can attack a square of daggerthorn briar (AC 18, other defenses 15; hp 70; vulnerable 10 fire). Once a square is destroyed, it cannot attack and is no longer difficult terrain.

Published in Dungeon Master's Guide, page(s) 90.