Rare · Tier III · Abyssal Terrors

Lighthouse

Engineering

Structured effects, restated

What one copy changes

Engineering

Changes Engineering by +20 points.

The recorded ownership limit is one copy.

Engineering

Changes Engineering by −1 point for every 1 structure; the resulting change truncates toward zero.

The recorded ownership limit is one copy.

Fog Visibility

Changes Fog Visibility by +100.

The recorded ownership limit is one copy.

Stat references: Engineering

Purchase-time direct weapon metric

Your before-and-after DPS

Weapon Tier

Current player state

Enter your current values before buying Lighthouse. Player stats use the same device-local values as the weapon pages.

% Attack Speed % Crit Chance % Crit Damage % Damage % Dodge % Life Steal % Speed Armor Curse Elemental Damage Engineeringitem input or output Harvesting Luck Max HP Melee Damage Player Level Range Ranged Damage structuresitem context

Using zero bonus player stats and zero item counters

Chain Gun goes from 65.48 to 720.32 expected primary-target DPS.

Direct DPS change +654.84 DPS +1,000%

What the comparison includes

Both sides use the shared expected primary-target, pre-mitigation direct-DPS engine. The after side adds fixed global-stat changes and the declared count/stat-scaled changes shown on this page. It includes staged damage rounding, crit expectation, projectile count, shooting duration, and steady-state mean cooldown.

It excludes enemy armor, target density, positioning, misses, overkill, burning, explosions, spawned attacks, temporary effects without a fixed duration state, conditional procs, target debuffs, and weapon-scripted damage changes. A displayed zero therefore means zero within this stated direct metric, not zero value in every combat situation.

Zero-stat baseline, highest available tier

Largest computed direct-DPS changes

Chain GunRanged · Tier IV 65.48 → 720.32 +654.84 DPS (+1,000%)
DrillMelee · Tier IV 38.85 → 116.54 +77.70 DPS (+200%)
ChainsawMelee · Tier IV 34.89 → 69.79 +34.89 DPS (+100%)
ScrewdriverMelee · Tier IV 33.03 → 59.45 +26.42 DPS (+80%)
War HammerMelee · Tier IV 104.23 → 125.08 +20.85 DPS (+20%)

Declared count/stat relationship

How the item’s value changes with its input

Engineering from structures

Changes Engineering by −1 point for every 1 structure; the result truncates toward zero.

structures	Engineering from this scaling effect	Net Engineering change from the item
0	0	+20
5	−5	+15
10	−10	+10
20	−20	0
30	−30	−10

Availability and ownership fields

Purchase facts

Rarity: Rare · Tier III
Price position: 50–61 lowest of 70 in this rarity
Ownership: Recorded ownership limit: 1 copy.
Shop lock: Can be locked in the shop
Crates: Included in normal crate eligibility
Unlock: Requires an unlock
Content: Abyssal Terrors
Curse field: Not a cursed item

Offer and resolved-stat relationships

Character-specific relationships

Filtered normal rolls

This item is filtered out of normal pre-final shop and crate rolls for the characters below. At the final-wave boundary and in endless, character filters are disabled. If filtering empties the candidate pool, generation can use an unfiltered backup pool. Upgrade rejection stops after 50 retries. These are offer filters, not ownership or use prohibitions.

Pacifist — included through Engineering

For declared direct stat effects, the same item calculation used on character pages applies each character’s stat-gain factors. A value group appears when the signed change is at least 50% of this item’s total absolute direct-stat magnitude.

Resolved direct-stat change: +50% or more

Builder — +50% normalized signed change (Engineering +20 resolves ×1.5)

Resolved direct-stat change: −50% or less

Cyborg — −75% normalized signed change (Engineering +20 resolves ×0.25)
Druid — −50% normalized signed change (Engineering +20 resolves ×0.5)
Mage — −50% normalized signed change (Engineering +20 resolves ×0.5)

Wanted-tag matches

Builder — matches Engineering; wanted-tag filter chance 5%
Dwarf — matches Engineering; wanted-tag filter chance 5%
Engineer — matches Engineering; wanted-tag filter chance 5%
Technomage — matches Engineering; wanted-tag filter chance 5%