Choo Choo Charles

Engine-Born Predator

Choo-Choo Charles is a colossal, land-walking predatory beast whose body resembles a locomotive in shape and structure, though it has no connection to tracks, rails, or any constructed system of travel. It moves through natural terrain with overwhelming force, breaking through forests, hills, and ruins through sheer physical momentum.

Despite its mechanical appearance, Choo-Choo Charles is not a construct. It is a living creature driven by instinct rather than intelligence. It does not plan, strategize, or employ higher reasoning. Instead, it reacts to movement, vulnerability, and proximity with immediate predatory aggression.

Darkvision of 60 ft

Its behavior follows a simple cycle of detection, pursuit, attack, and consumption. However, this cycle is unstable; when sufficiently injured or disrupted, its instincts may override aggression, causing it to abruptly disengage from combat and withdraw.

Creatures that survive encounters often describe it not as a rational predator, but as a roaming force of nature—an engine-shaped horror that behaves less like a hunter and more like an uncontrolled disaster given form

Maul

Melee Weapon Attack: +6 to hit, reach 10 ft., one target.
Hit: 2d10 + 4 bludgeoning damage.

If the target is Medium or smaller, it is also grappled (escape DC based on Strength) as part of the same hit.

This attack represents overwhelming mass and momentum rather than precision, functioning similarly to other monsters that apply grapple conditions on hit.

Bite

Melee Weapon Attack: +6 to hit, reach 5 ft., one target.
Hit: 1d10 + 4 piercing damage.

On a hit, the target is grappled (escape DC applies). While grappled in this way, Choo-Choo Charles can immediately use its Devour feature against the target.

Devour

Requires Grappled Target

Choo-Choo Charles attempts to force a grappled creature into its maw and consume it.

On success, the target is swallowed and the creature’s maw closes around it. While swallowed, the target is:

• Blinded
• Restrained
• Has total cover from effects outside the creature
• Takes ongoing internal damage at the start or end of each turn (DM’s choice)

The target remains swallowed until it escapes or is otherwise removed, following standard D&D creature swallow mechanics (as seen in monsters such as the giant toad and similar predatory beasts)

Choo-Choo Charles has no bonus actions.

It does not possess the tactical awareness, physical coordination, or behavioral complexity required to make use of bonus action economy. Its actions are fully expressed through instinctive movement and direct attacks.

When Choo-Choo Charles is reduced to a significant portion of his health during an encounter, he does not continue the fight to destruction.

Instead, he enters a Hunt Repositioning State.

Charles does not flee in fear. He is a territorial predator that abandons a fight only when:

• the prey proves too costly to finish immediately, or
• he determines a better hunting position is available elsewhere

He then:

• violently breaks pursuit
• withdraws along rail-lines or established movement paths
• disappears from the current battlefield entirely

He cannot be meaningfully pursued during this state, as he rapidly transitions into long-distance movement between regions of the island.