Dome Keeper Sword Dome Combat Guide and Upgrade Priority

To defend successfully with the Sword Dome in Dome Keeper, prioritize Blade Movement Speed Tier 1 before investing heavily in weapon damage, and alternate between wide perimeter slashes for swarms and charged thrusts for armored targets. At base speed, the blade cannot traverse the dome fast enough to catch split-flank spawns, making rotational mobility the primary bottleneck to surviving early combat rounds.

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Core Combat Mechanics: Slashing vs. Stabbing

The Sword Dome operates on a fixed track running along the dome's outer hull. It relies on two distinct physical attack profiles:

Lateral Slash: Sweeps the blade along the curvature of the dome. This attack creates a wide active hitbox designed to clear low-health swarms, small flying enemies, and clustered crawlers before they reach the hull.
Direct Stab: Projects the blade outward along a straight line perpendicular to the dome surface. Charging this attack deals concentrated piercing damage to high-health targets, such as armored walkers and burrowing monsters.

Slashing against heavy armor drags out encounters and allows enemies to deal chip damage to the dome. Position the blade directly above heavy hostiles, charge the stab, and release it as the enemy enters maximum extension range.

Attack Type	Primary Target Profile	Optimal Tactical Use
Lateral Slash	Swarms, small flyers, clustered ground creeps	Broad sweeps along the dome track to clear density
Direct Stab	Armored walkers, heavy burrowers, stationary spitters	Piercing burst damage aimed along direct approach angles
Reflected Slash	Ranged projectile casters, airborne artillery	Timed blade contact to deflect incoming bolts back at attackers

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Sword Dome Upgrade Priority

Positional delay causes more hull damage than low base attack power. If an aerial enemy spawns on the far right while you are clearing a crawler on the left, the base movement speed cannot cross the dome in time to stop the strike.

Invest your iron into combat upgrades in the following sequence:

Blade Movement Speed Tier 1: Eliminates sluggish transit between flanks and allows you to react to simultaneous split spawns.
Stab Damage & Reach: Lengthens the blade outward so you can strike hovering flyers and advancing heavy units before they reach the dome.
Blade Movement Speed Tier 2: Provides rapid repositioning against late-game multi-angle assaults.
Heavy Slash / Long Stab Upgrades: Adds the burst damage and reach required to clear larger, reinforced late-game waves.

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Using Projectile Deflection

Unlocking projectile reflection gives the Sword Dome a ranged defensive counter against airborne spitters. Floating artillery units often hang out of reach of standard slashes, forcing you to either absorb projectile fire or overcommit to risky stabs that leave the ground exposed.

When reflection is active, swinging the blade into an incoming plasma or acid bolt reverses the projectile along its flight path. The deflected shot carries high damage, frequently eliminating the attacker on impact. This allows you to neutralize distant flyers without abandoning the groundline.

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Target Priority During Mixed Waves

When monsters attack from both the air and ground, clear high-velocity threats first:

Airborne Spitters and Fast Flyers: Swivel the blade to the highest elevation and eliminate diving flyers with quick slashes.
Incoming Projectiles: Bat hostile bolts back toward ranged attackers with timed slashes.
Ground Swarms: Bring the blade down to sweep the base of the dome, flattening weak crawlers.
Armored Burrowers and Walkers: Center the blade directly above remaining high-health ground units, charge a heavy stab, and release it downward into the target.

Do not commit to a charged downward stab while aerial units remain on screen. The recovery animation leaves the upper dome temporarily unprotected against diving attacks.

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Balancing Weapon Tech with Mining Upgrades

Weapon upgrades must alternate with mining efficiency to keep your resource economy from stalling:

Cycle 1: Spend your first iron vein exclusively on Drill Tier 1 and carry capacity to build subterranean excavation speed.
Cycle 2: Direct your next iron haul into Blade Movement Speed Tier 1 to handle spreading wave spawns.
Subsequent Cycles: Alternate between drill power for deeper strata and stab reach or projectile deflection to meet rising wave strength.

Over-investing in combat during the first three cycles slows down your mining depth and mineral income. Conversely, neglecting blade rotation speed past the fourth wave guarantees hull damage, forcing you to spend valuable cobalt on emergency repairs instead of progression.