Universal Tower Defense Z Ruler Simon Guide: How to Unlock & Best Builds

Learn how to get and build Ruler Simon in Universal Tower Defense Z. Check out his stats, skills, and the best relics to maximize his damage.

The massive Roblox update has finally arrived, and players are scrambling to unlock the most powerful new units. If you are looking to dominate the battlefield, obtaining the Universal Tower Defense Z ruler simon unit should be at the very top of your priority list. This spectacular unit brings unparalleled visual flair and devastating mechanical power to your defense setups. In this guide, we will break down exactly how to secure the Universal Tower Defense Z ruler simon unit, analyze his unique mech-piloting abilities, and showcase the best builds to maximize his destructive potential.

How to Obtain Ruler Simon in Universal Tower Defense Z

Unlike some of the highly complex extraction units introduced in the latest update (such as the intricate Spider-Man grind), securing Simon is a much more straightforward process. He is primarily farmed through the newly introduced Legend Stage in the story mode.

To begin your grind, navigate to the latest story chapters. Completing the final Legend Stage gives you a direct chance to drop both the base unit and his essential evolution items.

Step-by-Step Farming Guide

To optimize your farming efficiency, follow these steps:

Prepare Your Team: Ensure you have reliable money-makers (like Speedwagon or other top-tier farm units) and solid crowd-control towers to handle the early waves.
Select the Legend Stage: Navigate to the final stage of the new story map.
Adjust the Difficulty: Increasing the difficulty multiplier raises your drop rates. While a maxed-out difficulty can be incredibly punishing, setting a moderate difficulty boost (such as a 6% to 10% increase) offers a balanced sweet spot for faster runs.
Use a Macro (Optional): Many players in the community report utilizing basic mouse-clicking macros to automate the placement of starting units, allowing them to loop the stage efficiently.
Check the Pity System: The stage features a guaranteed pity counter (typically around 30 runs) to ensure you eventually obtain the unit even if luck isn't on your side.

Legend Stage Drop Rates & Rewards

Reward Item	Drop Type	Estimated Drop Rate (Normal Difficulty)	Purpose
Simon (Base Unit)	Rare Drop / Pity	~3% to 5% (Guaranteed at 30 Pity)	The core unit needed for deployment.
Evolution Item	Uncommon Drop	~10%	Required to evolve Simon into his Ruler form.
Unrivaled Fragment	Rare Drop	~2%	High-value crafting material used for end-game upgrades.

Evolving Simon to Ruler Simon

Once you have secured the base Simon unit and his specific evolution item from the Legend Stage, you can evolve him directly in the lobby menu.

To speed up his progression, you can use promotional codes released by the developers. For instance, the community-favorite code "surfer whoopsie" awards players a free Ruler Ticket. Using this ticket bypasses some of the standard resource requirements, allowing you to instantly roll and transfer top-tier stats onto your newly evolved unit.

Evolution Requirements Comparison

Unit Form	Required Materials	Gold Cost	Key Upgrade Feature
Simon (Base)	None (Base Drop)	N/A	Ground-only single attacks, low range.
Ruler Simon	1x Evolution Item + Base Simon	5,000 Gold	Unlocks Mech Summon, Full AoE, and Active Controls.

Ruler Simon Stats and Upgrade Path

When you place the Universal Tower Defense Z ruler simon unit on the map, you will immediately notice his high deployment cost. He is an expensive, high-investment tower designed for mid-to-late-game wave clearance.

Upon placement, Simon spawns alongside his signature Gurren Lagann-inspired drill mech. Upgrading Simon automatically upgrades his accompanying mech, meaning you do not have to spend double the cash to keep both components viable.

In-Game Upgrade Costs and Stat Scaling

The following table details the investment required to fully max out Simon during a match (note: stats are based on a level 100 unit with no external relics equipped).

Upgrade Level	Cash Cost	Damage (DPS)	Range	AoE Type	Special Effects
Base Placement	$3,500	12,000	25	Full AoE	Spawns Drill Mech on path
Upgrade 1	$5,000	28,000	30	Full AoE	Increased Attack Speed
Upgrade 2	$8,500	55,000	35	Full AoE	Shield-Melting Passive
Upgrade 3	$12,000	95,000	40	Full AoE	Unlocks Active Mech Control
Max Upgrade	$22,000	180,000	50	Full AoE	Unlocks "Pierce the Stars"

Passives and Active Mech Control Mechanics

What makes the Universal Tower Defense Z ruler simon unit stand out from standard DPS towers is his unique gameplay loop. He does not attack like a conventional tower. Instead, his physical body remains stationary while his summoned drill mech patrols the nearest enemy track.

Analyzing Simon's Passives

Shield Melter: Simon's mechanical attacks deal bypass damage to enemy shields, making him incredibly useful against late-game bosses.
Hyper Armor & Hybrid Scaling: As Simon charges his drill via attacks, he gains temporary hyper armor and transitions into a hybrid (Ground/Air) attacking unit.
Critical Charge: Once his charge meter reaches 100%, Simon receives a temporary 100% critical hit rate buff, ensuring every single strike deals maximum damage.

Active Ability: Mech Control

By activating his primary skill, you gain direct manual control over the drill mech for 120 seconds. This mechanic functions similarly to other controllable boss units in the game, allowing you to physically steer the mech anywhere on the map to intercept leaking enemies.

While controlling the mech, you can cycle through three powerful active abilities:

Missile Drill Barrage: Fires a volley of explosive projectiles that saturate a wide area, dealing heavy burn damage.
Switch Attack: Alters the mech's combat stance, swapping between rapid-fire sweeping attacks and slower, high-impact single-target slams.
Pierce the Stars (The Ultimate Cutscene): Triggers a breathtaking, full-screen cinematic attack. Simon executes a massive drill break that obliterates everything in his path. This ability boasts incredible voice acting and visual effects that players widely consider to be among the best animations in Roblox tower defense history.

Best Relics and Builds for Ruler Simon

To truly unlock the potential of the Universal Tower Defense Z ruler simon unit, you must equip him with the correct gear. Because Simon has a built-in passive that grants him a temporary 100% critical strike rate, stacking flat critical rate relics is generally suboptimal. Instead, you should focus on maximizing his raw damage output and elemental scaling.

For more information on general gear mechanics, you can read up on the Roblox Game Page to stay updated on current item interaction rules.

Recommended Relic Builds

Build Type	Slot 1 Relic	Slot 2 Relic	Playstyle Goal
Pure Elemental DPS	Fire/Explosion Damage Relic	Attack Speed Relic	Maximizes the damage of the Missile Drill Barrage.
Boss Killer	Critical Damage Relic (CDMG)	Flat Attack Power Relic	Capitalizes on his 100% critical rate passive to melt boss health bars.
Cooldown Reduction	Skill Cooldown Relic	Range Boost Relic	Allows you to trigger the manual Mech Control and "Pierce the Stars" ultimate more frequently.

Is Ruler Simon Worth the Grind?

The consensus among the community is highly positive. While some players express frustration over minor bugs in the story mode's ending screens, the developer team has been quick to deploy hotfixes.

If you are looking for a highly engaging unit that breaks up the monotony of passive tower defense gameplay, Simon is absolutely worth the effort. His manual control system allows you to actively save runs from leaking enemies, and his shield-melting capabilities make him a top-tier contender for infinite mode runs.

Frequently Asked Questions

How do I get the Universal Tower Defense Z ruler simon unit?

You can get the base Simon unit and his evolution item by farming the final Legend Stage of the new story mode. He features a 30-run pity system to guarantee a drop.

What does the "surfer whoopsie" code do?

Entering the code "surfer whoopsie" in the game's code menu rewards you with a free Ruler Ticket, which can be used to easily reroll and optimize the stats of your Universal Tower Defense Z ruler simon unit.

Can Ruler Simon hit flying units?

By default, Simon is a ground-based unit. However, once his charge meter reaches maximum capacity during battle, he gains hybrid status, allowing his drill attacks to target both ground and flying enemies.

What is the best relic build for Ruler Simon?

Since Simon can naturally reach a 100% critical hit rate through his passive ability, the best build focuses on Critical Damage (CDMG) Relics and Elemental/Explosion Damage Relics rather than flat critical rate stats.