EternalTD Towers

EternalTD has one damage tower, one wall tower, and a family of support towers that modify whatever Basic Tower they sit next to. Every tower in a player's hotbar/inventory is generated from the current source code, so the numbers below match what shows up in the in-game item lore.

Tower Costs and Display Materials

Tower	Base cost (gold)	Item material	Entity used as tower body	Elemental attunement
Basic Tower	10	ARROW	SKELETON	Unattuned
Barricade	3	OAK_FENCE	IRON_GOLEM	Unattuned
Sugar Tower	20	SUGAR	SHEEP	Air
Spyglass Tower	20	SPYGLASS	PHANTOM	Unattuned
Beam Generator	40	BEACON	GUARDIAN	Air
Explosion Factory	40	TNT	CREEPER	Earth
Ice Box	40	SNOWBALL	POLAR_BEAR	Water
Armor Crusher	40	SHIELD	PIGLIN_BRUTE	Earth
Obsidian Quarry	20	OBSIDIAN	ENDERMAN	Earth
Gold Mine	100	GOLD_ORE	VILLAGER	Unattuned
Napalm Dispenser	40	BLAZE_POWDER	BLAZE	Fire

Tower Pricing Scaling

Tower costs start at the base price and stay there for the first 15 towers in a session. After that the code increases the displayed price using:

cost + 1.2 * floor(totalTowersInSession / 10)

So adding more towers slowly inflates the price of new ones. The upgrade cost for any tower is always 4 × currentCost. Selling a tower returns 75% of its current cost (or full purchase price if you sell within 5 seconds of placing it).

Basic Tower

The only tower that actually deals damage.

• Base damage: 1
• Base range: 10 blocks
• Base attack speed: 2 seconds per shot
• Upgrade doubles the tower's damage on each level and changes its armor tier (leather to iron to gold to diamond to netherite).
• Shoots arrows by default. Behavior changes when paired with support towers.

Barricade

A pure wall tower.

• Cannot be upgraded.
• Cannot block enemies if it leaves no path to the end (pathfinding check happens on placement).
• Provides no combat bonus.

Support Towers

Support towers do not shoot. They modify a Basic Tower in any of the 8 squares adjacent to them. Effects from multiple support towers stack on the same Basic Tower.

Sugar Tower (Attack speed)

• Baseline attack-speed bonus: +10% per Sugar Tower placed next to a Basic Tower.
• Each upgrade adds another +10%.

Spyglass Tower (Range)

• Baseline range bonus: +1.5 blocks.
• Each upgrade adds another +1.5 blocks.

Beam Generator (Transformation: Beam tower)

• Adds a "beam generator count" to the Basic Tower.
• Transforms attack into a beam:
  • 0.5 second base attack speed instead of 2 seconds.
  • Base damage drops to 1/8 of the tower's damage.
  • After a 3-second charge against the same target, the beam reaches its maximum damage multiplier (3×).
• Upgrades add more beam generators, which shorten the warmup time (60 − 3 × (beamGenerators − 1) ticks).
• The beam is purely visual particles, no entity projectiles.

Explosion Factory (Transformation: AOE)

• Baseline AOE radius: 2.0 blocks.
• Each upgrade adds 0.5 blocks of AOE radius.
• Direct-hit damage is not applied to the primary target; instead, every wave entity within the AOE radius takes the tower's processed AOE damage (1/4 of base).
• Other support effects (slow, fire DOT, etc.) propagate through the AOE damage call.

Ice Box (Slow)

• Baseline slow on hit: 5% movement speed reduction.
• Each upgrade adds another 5%.
• Slow lasts 5 seconds per hit.
• resist wave entities ignore slow effects entirely.

Armor Crusher

• Baseline armor damage: 20% of the tower's damage.
• Each upgrade adds 10% more.
• Wave entities at wave 10 and above gain armor (maxHealth / 80), which subtracts from incoming damage until shredded. Armor Crusher chips that armor down faster.

Obsidian Quarry (Critical hits)

• Baseline crit chance: 5%.
• Each upgrade adds another 5%.
• Crits multiply damage by 1.5×.
• Total crit chance is capped at 100%.

Gold Mine (Bounty)

• Baseline currency bonus: +10% on kills made by the attached tower.
• Each upgrade adds another 10%.

Napalm Dispenser (Fire DOT)

• Baseline fire-DOT share: 10% of the tower's damage is dealt as fire damage over time.
• Each upgrade adds another 10%.
• Fire DOT bypasses armor and applies as 3 ticks over 9 seconds.
• The DOT amount is removed from the direct hit damage so total damage stays balanced.
• Total fire-DOT share is capped at 100%.

Tower Upgrade Visuals

Tower armor stand equipment changes with each upgrade level:

• Level 2 — leather armor
• Level 3 — iron armor
• Level 4 — gold armor
• Level 5 — diamond armor
• Level 6 — netherite armor

When FreeMinecraftModels is installed, the model also swaps between named variants per level (stone, gold, diamond, emerald, netherite, redstone).

Bonus Display Tags

When a Basic Tower has at least one support tower attached, EternalTD spawns invisible armor stands above it that show the live effective stats:

• Damage, Attack Speed
• [Spyglass] +X range
• [Sugar] +X% attack speed
• [Beam] charge time / 0.5s base attack speed / charged beam damage
• [Explosion] X explosion range / X explosion damage
• [Ice] X% slow on attack / 5s slow duration
• [Crusher] X base damage to shield icon
• [Gold] +X% gold/kill
• [Glass] X% crit chance
• [Napalm] X% true damage fire DOT

Player Tooling

Inside an active session the player gets:

• A guide book (slot 0)
• Basic Tower and Barricade in the lower hotbar (slots 1, 2)
• Upgrade, Sell, and Next Wave tools (slots 6, 7, 8)
• The full support tower roster in the inventory row above (slots 9-20)

Right-clicking with a tower item builds it on the targeted grid square. Right-clicking with the Upgrade or Sell tool acts on the targeted tower square. Right-clicking with the Next Wave tool ends the construction phase early.