The villainous Gemini from Thundarr the Barbarian For Sword of Cepheus 2nd Edition

 Bringing the 80s Saturday-morning post-apocalyptic swagger of Thundarr the Barbarian into the gritty, OSR-style mechanics of Sword of Cepheus 2nd Edition is an awesome cross-genre mix.

Gemini is the ultimate Thundarr antagonist: an evil, ancient-tech-wielding cyborg sorcerer with a literal split-personality. His head rotates 180° beneath his visor to switch between a short-tempered, aggressive tactical persona and a cold, calculating, diplomatic side.

Here is how you can stat and run Gemini as a major planetary warlord or cosmic threat using the Sword of Cepheus system.

Gemini — Cyber-Sorcerer Warlord

Gemini functions beautifully as a high-tier Sorcerer boss who balances brutal raw physical power with high-tech Sorcery (which, in a Thundarr setting, is a mix of genuine magic and hyper-advanced pre-collapse tech).

Attributes & Basic Stats

• STR: 11 (+1)

• DEX: 9 (+0)

• END: 13 (+2)

• INT: 10 (+0)

• EDU: 9 (+0)

• SOC: 12 (+2) — Warlord/Sorcerer-King status

• Stamina: 25

• Lifeblood: 13

• Armor: 8 (Heavy Cybernetic Powered Frame / Visor)

Skills

• Sorcery-4

• Combat (Unarmed)-2

• Leadership-2

• Tactics-2

• Deception-2

• Vehicles (Grav/Flying)-1

Dual-Persona Mechanics (The Two Faces)

Gemini’s most famous feature is his rotating head. In Sword of Cepheus, this acts as a unique tactical shift. At the start of any round, Gemini can spend a minor action to rotate his head, immediately switching his active combat profile.

Face Mode	Tactical Effects
Aggressive Face (Furious & Short-tempered)	Gemini gains +2 to all Melee Damage rolls and becomes immune to morale checks or psychological manipulation. However, he suffers a -1 penalty to Sorcery checks as anger clouds his focus.
Calm Face (Diplomatic & Cold)	Gemini gains +1 to all Sorcery checks and +2 to Deception/Leadership tasks. He prefers to let his minions fight while he channels devastating energy attacks or plots a strategic escape.

Special Powers & Cyber-Sorcery

Because Sword of Cepheus models magic through distinct spells, Gemini's cartoon abilities translate directly into potent Sorcery effects. He uses INT as his casting characteristic.

• Beam-Eyes (Energy Blast): Gemini can fire destructive red laser beams from his eyes.

  • Mechanic: Range 30m, Damage 3d6, uses Sorcery skill to attack.

• Immobilization Beam: A crimson tractor-like beam that freezes targets in place.

  • Mechanic: Target must succeed on an END check (Difficulty: 10) or be paralyzed for 1d6 rounds. Gemini must maintain concentration to keep them pinned.

• Sorcerous Barrier: A blazing wall of blue magical flame.

  • Mechanic: Creates a physical barrier blocking movement and ranged attacks. Anyone attempting to cross takes 2d6 energy damage.

• Flight (Thundercloud): Gemini can manifest a dark cloud to hover and fly at speeds up to 60 km/h.

Arsenal & Forces

Gemini rarely fights alone. He rules from a high-tech fortress on stilts in the swamps near the ruins of "Manhat" (New York), commanding an army of mutants and robots.

• The Groundlings: Rat-like mutant underlings. Give them Combat (Slug Throwers)-1 or Combat (Melee)-1, and equip them with scavenged pre-collapse motorcycles and Beam-Clubs (treat as maces with an extra +1d6 energy damage).

• Robotic Knights: Gemini's elite mechanical shock troops. They have Armor 6, Stamina 15, are immune to mind-altering magic, and carry metallic energy weapons or pilot pre-collapse attack helicopters.

GM Running Tip: Play up the cartoon villainy! Gemini is arrogant, cruel, and cannot tolerate failure from his Groundlings. If a player manages to damage or Jam his helmet visor, a Hard (-2) Athletics or Combat check can force his head to lock halfway between rotations—leaving him completely disoriented and unable to use his face abilities for 1d3 rounds!

Here are the full Sword of Cepheus 2nd Edition NPC stat blocks for Gemini's Robotic Knights and his rat-like mutant underlings, The Groundlings.

Both are designed to scale smoothly inside a classic Thundarr-inspired science-fantasy sandbox.

1. Robotic Knights (Elite Shock Troops)

These mechanical enforcers are the backbone of Gemini's heavy terror operations. They look like towering, blank-faced medieval knights forged from polished chrome and black polymer, completely silent until they strike.

Unlike the bumbling Groundlings, the Robotic Knights are cold, relentless, and tactically precise.

Attributes & Basic Stats

• STR: 12 (+2)

• DEX: 8 (+0)

• END: 12 (+2)

• INT: 8 (+0) (Advanced Combat Logic AI)

• EDU: 0 (-3)

• SOC: 0 (-3)

• Stamina: 16

• Lifeblood: 12

• Armor: 6 (Integrated Heavy Plasteel Chassis)

Skills

• Combat (Energy Weapons)-2

• Combat (Heavy Blades)-1

• Athletics-1

• Recon-1

Traits & Abilities

• Construct: Robotic Knights are entirely mechanical. They are completely immune to poison, disease, suffocation, vacuum, and mind-altering magic or illusions. They cannot heal naturally and must be repaired using the Repair skill.

• Internal Targeting: When using built-in or synced energy weapons, they ignore the first -1 penalty from range or concealment.

Equipment & Attacks

• Heavy Laser Rifle: Range 150m, Damage 4d6, Magazine: Internal power pack (20 shots).

• Vibro-Broadsword: Damage 3d6+2 (ignores 2 points of physical armor).

• Built-in Comms: Linked directly to Gemini's fortress mainframe.

2. The Groundlings (Mutant Foot Soldiers)

The Groundlings are craven, rat-faced beastmen who worship Gemini out of sheer terror. They are numerous, loud, poorly disciplined, and survive entirely on scavenged pre-collapse scrap.

They are best used in large packs to overwhelm the party's frontline or ambush them on motorized skiffs.

Attributes & Basic Stats

• STR: 8 (+0)

• DEX: 10 (+0)

• END: 9 (+0)

• INT: 6 (-1)

• EDU: 4 (-1)

• SOC: 2 (-2)

• Stamina: 8

• Lifeblood: 9

• Armor: 2 (Scavenged tire-tread leather and scrap metal plates)

Skills

• Combat (Slug Throwers)-1

• Combat (Unarmed)-1

• Survival-1

• Stealth-1

• Vehicles (Grav/Ground)-1

Traits & Abilities

• Pack Tactics: Groundlings are cowards alone but vicious in numbers. They gain a +1 bonus to hit in melee for every other Groundling adjacent to their target (maximum +3).

• Craven Morale: If their pack drops to half its original numbers, or if a Robotic Knight supervisor is destroyed, the remaining Groundlings must pass an Average (+0) END or INT check or immediately flee, surrender, or scatter into the ruins.

Equipment & Attacks

• Scavenged Autopistol: Range 25m, Damage 2d6+2.

• Spiked Club / Scrap Cleaver: Damage 2d6.

• Scavenged Junk-Cycle: Rough terrain motorcycle used for desert or ruin patrols.

Encounter Design Tip: A standard Gemini strike team consists of one Robotic Knight acting as a cold, unyielding commander over a squad of 4–6 Groundlings. The Knight will ruthlessly coordinate the fire of the Groundlings, using them as a meat-shield while keeping its heavy laser rifle trained on the party's heavy hitters or sorcerers.