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Leviathan BX-9 "Mawbreaker"Mech

Leviathan BX-9 "Mawbreaker"

legendary assault-class mech — 95 tons

Armor: 420

Heat Capacity: 48

Speed: 5

Jump Jets: No

Weapon Systems

Plasma Rail Cannon (right arm)12d12 plasma +10 heat
Ion-Charged Plasma Bolts (right arm (rail attachment))8d10 ion +8 heat
Plasma-Imbued Buzzsaw Sword (right arm (under-mount))5d8 slashing +5 heat
Heavy Laser Cannon (left arm)4d12 laser +9 heat
Twin Artillery Cannons (left arm (flanks))8d10 explosive +7 heat
Quad Missile Mortar (16 missiles, 8 warheads each) (back)10d12 explosive +6 heat
Dual Cryo Cannons (shoulders)8d10 cold +2 heat
Dual Miniguns (shoulders)4d6 kinetic +4 heat
Elbow Shuriken Launchers (elbows)3d10 slashing +2 heat
Sonic Screech / Tungsten-Shear Maw (head)5d10 thunder +6 heat

Special Systems

Fission Antimatter Core (Enhanced Power), Biovein Regeneration Network, Ion Field Amplifier (Rail Cannon), Targeting Computer MK-VII, Reinforced Pilot Cockpit (Upper Chest), CASE II (Ammunition Protection), Thermal Dissipation Fins (Cryo-linked)

On Hit: Ion Field Amplifier: When the Plasma Rail Cannon hits, the ion field doubles armor penetration. Ignore up to 15 points of the target's armor rating on that attack.
On Critical Hit: Warhead Cascade: On a critical hit with the Quad Missile Mortar, all 8 warheads detonate simultaneously. Deal an additional 6d10 explosive damage in a 20-foot radius.
Activated: Sonic Screech: Once per round as a bonus action, unleash a sonic screech in a 60-foot cone. Ceramic and lightly armored targets (armor below 150) make a DC 18 Constitution save or are Stunned 1 round and take 5d10 sonic damage. Metal-armored targets take 3d6 burn damage.
Activated: Elbow Shuriken Mode Toggle: Switch between Launched (ranged 120 ft, 3d10 slashing) or Buzzsaw (melee reach 10 ft, 4d10 slashing + 2d6 ongoing bleed) as a free action.
Passive: Biovein Regeneration: At the start of each pilot turn, recover 15 armor rating points up to maximum.
Passive: Fission Antimatter Core: Never runs out of power for standard systems. Heat capacity increased by 10. Core breach triggers On Overheat immediately.
On Overheat: Antimatter Core Breach: If heat capacity is exceeded or core is breached, catastrophic antimatter explosion. All targets within 200 feet take 20d12 plasma/radiation damage (DC 22 Dex save for half). Mech destroyed.
On Hit: Cryo Suppression: Targets hit by Dual Cryo Cannons have speed halved and suffer -2 to attack rolls until end of their next turn. Critical hit: target is Frozen for 1 round.

The Leviathan BX-9 Mawbreaker is a 95-ton assault-class biomech standing 70 feet tall. Piloted from a reinforced cockpit above its Fission Antimatter Core. Speed 5, no jump jets. Biovein Regeneration restores 15 armor rating per turn. WEAPONS: Right arm mounts a Plasma Rail Cannon (12d12 plasma, ion-field armor pierce 15) with Ion-Charged Plasma Bolts (8d10 ion) and under-mount Plasma-Imbued Sword (5d8 slashing/plasma). Left arm carries Heavy Laser Cannon (4d12 laser) flanked by Twin Artillery Cannons (8d10 explosive). Shoulders mount Dual Cryo Cannons (8d10 cold) and Dual Miniguns (4d6 kinetic). Back mortar fires 4 missiles per salvo from 16-missile magazine, 8 warheads each (10d12 explosive). Elbows carry toggle-mode shurikens. Sonic Screech fires as bonus action in 60-ft cone. HEAT: Full salvo capped at 48. Thermal Dissipation Fins reduce heat by 4 when Cryo Cannons fired this turn. Core Breach on destruction: 20d12 plasma/radiation, 200-ft radius, DC 22 Dex save for half. Boss-tier encounter for 4-6 high-tier players.

assaultbiomechlegendaryheavy weaponsplasmarail gunartillerymissilessoniccryolasermeleeshurikenbossantimatterregenerationion fieldminigunmortarbiotech
Text: Claude Sonnet 4.6Image: Nano BananaStyle: Cyberpunk

“A 70 foot tall biomech with a mouth full of razor sharp teeth that can cut tungsten and release a sonic screech that can shatter ceramic and burn through metal. It has a fission antimatter core located in the top center of the chest. Right above that is the pilot's cockpit and then it has these somewhat bulky legs with a tail and it has these glowing blue veins all around it. On its left arm it has a laser cannon and two artillery cannons on the sides of that. On its right arm is a rail gun with a plasma imbued sword underneath it. The rail gun shoots plasma bolts that go through an ion field for maximized damage and then on the back it has a mortar that can launch four missiles at a time. The mech has 16 missiles each of which have eight warheads inside them to do a lot for maximum damage. On the shoulders it has two cryo cannons and two miniguns. On its elbows are two shurikens that can be launched or used as buzzsaws.”