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Learn how to walk over poison swamp tiles without taking damage in Dragon Quest 1 HD-2D Remake. Complete guide to the Safe Passage spell and obtaining Erdrick's Armour from the Knight Aberrant boss.
As you explore the vast world of Alefgard in Dragon Quest I HD-2D Remake, you’ll quickly notice those ominous purple tiles scattered across the landscape. These swamp tiles damage your hero with every step, gradually chipping away at your HP as you traverse certain areas.
Early in the game, this constant damage can be annoying and potentially dangerous, especially if you’re low on healing items or far from a safe resting spot. Fortunately, there are two solutions to this problem—one available early in your journey, and one that requires significant progression and combat prowess.
Let me break down both methods so you can choose the approach that fits your current stage in the game.
The first and most accessible way to handle poison tiles is by learning the Safe Passage spell. This is a spell you can obtain relatively early in your adventure, making it the go-to solution for most of the game.
Location: Galenholm
When you can access it: Early in the story

Galenholm is a town you’ll visit during the early portions of Dragon Quest 1’s main storyline. If you’re also working through the Zalen questline, you’ll encounter him here as well, making it a particularly worthwhile stop.
Step-by-step instructions:
Once you’ve grabbed the scroll, here’s how to activate it:
Using the spell in the field:
While Safe Passage is active, you can walk over purple swamp tiles without taking any damage. The effect lasts for a set number of steps, so you’ll need to recast it periodically if you’re traversing large poisonous areas.
MP Management Tip: Safe Passage costs MP to cast, so be mindful of your mana reserves. If you’re planning a long journey through swampy terrain, consider bringing Magic Water or resting at an inn before venturing out. For more tips on managing your resources, check out our items and combat guide.
This spell is invaluable throughout the mid-game when you’re exploring remote areas of Alefgard. Certain dungeons and landmark locations feature extensive swamp sections, and Safe Passage lets you navigate them without constantly stopping to heal.
It’s also helpful when you’re grinding for experience or searching for treasure in swampy regions. The less HP you waste on environmental damage, the longer you can stay in the field before needing to return to town.
The second method for handling poison tiles is to obtain Erdrick’s Armour, one of the legendary hero’s most powerful equipment pieces. This isn’t just a solution to poison tiles—it’s one of the best armor pieces in the entire game.

When equipped, Erdrick’s Armour provides multiple game-changing benefits:
Essentially, once you have this armor, you’ll never need to cast Safe Passage again. The passive regeneration alone makes it worth the effort to obtain, as you’ll naturally heal between battles while exploring.
Here’s where things get challenging. Erdrick’s Armour is obtained by defeating the Knight Aberrant, a powerful optional boss found in the town of Damdara.
Location: Damdara
Where to find it: Southwest corner of Alefgard, between Faerie Village and the Citadel of the Monarch of Medals
Finding the Knight Aberrant:
Important note: This is an optional encounter, meaning you can challenge it whenever you feel ready. There’s no time limit or story requirement, so don’t feel pressured to tackle it before you’re properly prepared.
The Knight Aberrant is legitimately one of the toughest fights in Dragon Quest 1 HD-2D Remake. This isn’t a boss you can stumble into and expect to win—you need proper preparation and a solid tactical approach.

Minimum Level: 30+
Don’t even consider attempting this fight below Level 30. Even at that level, you’ll need to execute your strategy flawlessly. If you’re struggling at Level 30, grind to Level 31 or 32 before trying again.
Essential Equipment:
Before challenging the Knight Aberrant, make sure you have the best available gear:
If you’re missing any of these pieces, take time to acquire them before the fight. The difference between mediocre equipment and optimal equipment is often the difference between victory and defeat.

Make sure you’ve learned the Moreheal spell before attempting this boss. This powerful healing spell is absolutely critical for surviving the Knight Aberrant’s damage output.
Moreheal restores significantly more HP than the basic Heal spell, allowing you to recover from the knight’s hardest-hitting attacks. Without it, you’ll struggle to keep pace with the incoming damage.
For help finding other powerful spells, check our complete guide to special scrolls and skills.
Here’s the proven method for taking down the Knight Aberrant:
Turn 1 – Set Up Your Defense:
Throughout the Fight:
Healing Priority System:
Follow these HP thresholds religiously:
The Knight Aberrant can apply a defense debuff that makes you take significantly more damage. When you see this status effect, immediately raise your healing threshold. One unlucky hit while debuffed and under 275 HP can end your run.
Offensive Approach:
What makes this boss dangerous is the potential for nasty attack sequences. The Knight Aberrant can:
The randomness factor means even with perfect execution, you might get unlucky with a brutal combo. Don’t get discouraged if you lose a few attempts—that’s part of the challenge.
Mental preparation: Accept that this might take 3-5 attempts even with optimal strategy. Each failed attempt teaches you more about the boss’s patterns and timing.
After defeating the Knight Aberrant, you’ll see a glowing spot appear in the arena. Interact with it to claim your prize: Erdrick’s Armour.
Immediately equip it and enjoy never worrying about poison tiles again. The passive regeneration will also make general exploration significantly more comfortable, as you’ll naturally heal between random encounters.
This armor will serve you through the endgame, making it one of the most valuable pieces of equipment you’ll obtain during your entire playthrough.
The answer depends on where you are in your journey:
Early to Mid-Game (Levels 1-25):
Late Game (Level 30+):
Completionist Approach:
Beyond solving the poison tile problem, Erdrick’s Armour has strategic value in challenging encounters. If you’re working through difficult areas like Weirdwood and the Mirages boss fight, the passive regeneration and damage reduction can be the difference between success and failure.
The armor also makes dungeon exploration more efficient. Since you’re constantly regenerating HP, you can fight more consecutive battles before needing to rest or use healing items. This speeds up experience grinding and resource collection significantly.
Poison tiles are a persistent hazard throughout Dragon Quest I & II HD-2D Remake, but they don’t have to be a major obstacle. Whether you choose the accessible Safe Passage spell or invest the time to obtain Erdrick’s Armour, you have effective solutions available.
For most players, I recommend this progression:
The Knight Aberrant fight is tough, but the rewards are absolutely worth the effort. Erdrick’s Armour isn’t just a quality-of-life upgrade—it’s a significant power increase that makes the late-game content more manageable.
With the information in this guide, you’re ready to tackle poison tiles head-on (or just walk right over them without a care). Good luck with the Knight Aberrant, and may Erdrick’s legacy guide your path through Alefgard!