Creature Reference Back to Creatures

Oaken Sentinel

Huge · Plant · CR 10 · Unaligned

Source. Tome of Beasts 3

16 (natural armor)

189 (18d12+72)

Ability Scores

Core attributes and their modifiers.

STR

DEX

-2

CON

INT

-3

WIS

-1

CHA

-4

Overview

Category Monsters

Size Huge

Type Plant

Alignment Unaligned

XP 5900

Initiative Bonus -2

Movement

Walk 10 ft (3 m)

Swim 5 ft (1.5 m)

Climb 5 ft (1.5 m)

Crawl 5 ft (1.5 m)

Senses

Blindsight 120 ft (36.6 m)

Passive Perception 9

Skills

Perception -1

Languages

Sylvan

Resistances & Immunities

Damage Resistances

bludgeoning, piercing

Damage Vulnerabilities

lightning

Condition Immunities

blinded, deafened, frightened, prone

Traits

False Appearance

While motionless indistinguishable from ordinary oak tree.

Grasping Branches

Can have up to six Grasping Branches at a time. Each Grasping Branch can be attacked (AC 16; 25 hp; vulnerability to lightning; immunity to poison and psychic). Destroying a Grasping Branch deals no damage to the oaken sentinel which can extend a replacement branch on its next turn. A Grasping Branch can also be broken if a creature takes an action and succeeds on a DC 16 Str check vs. it.

About Oaken Sentinel

Oaken Sentinel is a huge plant with a Challenge Rating of 10. It has a unaligned alignment.

In combat, this creature maintains an Armor Class of 16 and possesses 189 hit points (derived from 18d12+72).

Oaken Sentinel has communication capabilities including Sylvan. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Oaken Sentinel

2 tips available

When using Oaken Sentinel in your D&D 5e campaign, consider these tactical approaches:

Boss Encounter: Suitable for climactic moments
Multi-phase Battle: Plan dramatic tension with multiple phases

Player Guide: Facing Oaken Sentinel

2 strategies available

When your party encounters this creature, keep these strategies in mind:

Major Threat: Prepare for epic battle
Resource Management: Conserve powerful abilities

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 10.

Solo Encounter:

A single character of level 13 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 11,000 XP
Hard: 16,500 XP
Deadly: 22,000 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Oaken Sentinel?: Oaken Sentinel has a Challenge Rating of 10, making it appropriate for parties of level 10.0.
What type of creature is Oaken Sentinel?: Oaken Sentinel is a Huge Plant, which affects how certain spells and abilities interact with it.
What languages does Oaken Sentinel speak?: Oaken Sentinel can communicate in Sylvan.