Ultimate Tower Defense
Home/Updates/Summer Event 2026
Updates

Summer Event 2026

This event has a Limited summer event Raid alongside 2 other modes, Hard and Normal in which you can obtain a limited time Shells which are this event's currency. The Shells can be used to summon for Summer limited units on the Summer Banner or buy stuff the Summer event shop. The raid in this event also drops a very rare meme character.

Updated by UtdisgoatedVersion 337 September 2026

Overview

The Summer Event 2026 started on August 8th, 2026. The event features a dedicated event lobby, four event gamemodes (Raid, Hard, Normal, and Easy), an Event Banner containing 8 units, an Event Battlepass, an Event Calendar, Event Attendance rewards, daily Event Quests, daily Event Gifts, and an Event Shop.

Raid

Raid Map

SummerEvent2026RaidMap

A raid occurs every 30 minutes with a cap of 18 players. The only banned tower for this raid is "The Mad Titan". Anyone who deals 0 damage during the raid will not receive any rewards.

The Raid consists of 25 waves and features 1 boss with a 1,000 HP shield. Enemy health scales higher with more players in the lobby.

Raid Rewards

  • Shells: 1,500 Shells
  • Unit Drop: The Pretender (0.001% chance)

Hard, Normal, and Easy Modes

Both Hard and Normal modes occur every 20 seconds with a cap of 6 players per lobby. Players dealing 0 damage will not receive rewards.

Hard Mode

SummerEvent2026HardMap

Waves: 20

Rewards: 500 Shells

Normal Mode

SummerEvent2026NormalMap

Waves: 15

Rewards: 250 Shells

Easy Mode

SummerEvent2026EasyMap

Waves: 10

Rewards: 125 Shells

Summer Banner

The Summer Event Banner features 8 unique units:

Rarity Unit Rate
Common Star Mars 54.8%
Rare Julia 25.0%
Legendary Canni 12.0%
Mythical Water Magician 5.0%
Godly Hellfire Lioness 2.0%
Divine Shark Ninja 0.7%
Ultimate Flocka 0.4%
Secret The Claudius 0.1%

Summer Event Shop

The Summer Event Shop uses Shells as currency.

Items

  • Aestus (Random Purity) x1: 2,500 Shells
  • Aestus (Masterwork) x1 [1/1]: 15,000 Shells
  • Trait Rerolls x5 [21/21]: 1,600 Shells
  • Trait Rerolls x5 [20/20]: 1,200 Shells
  • Perk Rerolls x5 [20/20]: 1,200 Shells
  • Perk Rerolls x5: 1,600 Shells
  • Impure Soul x5 [5/5]: 3,750 Shells
  • Impure Soul x5: 5,000 Shells
  • Pure Soul x1 [3/3]: 11,500 Shells
  • Pure Soul x1: 15,000 Shells
  • Banner Luck Potion x1: 7,500 Shells
  • Crafting Luck Potion x1: 7,500 Shells
  • Ruby Miner Potion x1: 7,500 Shells
  • Mount Catcher Potion x1: 7,500 Shells
  • Mundane Grimoire x5 [50/50]: 10,000 Shells
  • Rare Grimoire x5 [40/40]: 10,000 Shells
  • Epic Grimoire x5 [30/30]: 10,000 Shells
  • Legendary Grimoire x5 [20/20]: 10,000 Shells
  • Forbidden Grimoire x5 [10/10]: 10,000 Shells
  • Blank Key x1: 2,500 Shells
  • Lost Chest x1: 1,200 Shells

Skins

All event skins cost 5,000 Shells each:

  • Summer Sanjae
  • Summer Tsunami
  • Summer Ori
  • Summer Kojo Unmasked
  • Summer Gato
  • Summer Power

Summer Event Calendar

The Summer Calendar features 28 days packed with Shells and other items. Due to an event delay, the first 7 days were unlocked for free. The final reward on Day 28 is an exclusive skin for Tohi.

Note: Missed days can be purchased for 200 Gems (1 day ago), increasing by +100 Gems per additional day missed.

Day Rewards Day Rewards
1 100 Shells 15 150 Shells
2 100 Shells 16 150 Shells
3 100 Shells 17 150 Shells
4 100 Shells 18 150 Shells
5 100 Shells 19 150 Shells
6 100 Shells 20 150 Shells
7 x5 Perk Rerolls, x5 Trait Rerolls, 250 Shells 21 x7 Perk Rerolls, x7 Trait Rerolls, 750 Shells
8 125 Shells 22 175 Shells
9 125 Shells 23 175 Shells
10 125 Shells 24 175 Shells
11 125 Shells 25 175 Shells
12 125 Shells 26 175 Shells
13 125 Shells 27 175 Shells
14 x6 Perk Rerolls, x6 Trait Rerolls, 500 Shells 28 x8 Perk Rerolls, x8 Trait Rerolls, Tohi's Summer Skin, 1000 Shells

Summer Event Gifts

Summer Gifts were daily rewards that could be obtained by simply logging in. There were also exclusive gifts for keeping 5 and 7 day strekas.
The rewards were as follows:
Day 1: 125 Shells
Day 2: 175 Shells
Day 3: 225 Shells
Day 4: 275 Shells
Day 5: 1 Summer Capsule
Day 6: 2 Summer Capsules
Day 7: 50% Battlepass Xp and 3 Summer Capsules
5 Day Streak: 3 Summer Capsules
7 Day Streak: 100% Battlepass Xp and Coconut Mount

This is what the full menu looked like:
SummerGifts

Summer Event Attendance

Summer attendance featured daily rewards obtainable by spending time in-game for certain amounts of time. 
The rewards were:
5 Minutes: 100 shells
10 Minutes: 125 Shells
15 Minutes: 150 Shells
30 Minutes: 200 Shells
1 Hour: 2 Summer Capsules and 300 Shells
2 Hours: 5% Battlepass Xp and 400 Shells
3 Hours: 25% Battlepass Xp and 500 Shells

This is what the full menu looked like:
SummerAttendance

Summer Event Quests

The Summer Questboard featured 4 different tasks that switched daily. There were 3 difficulties, Easy, Normal, and Hard. Easy quests gave 5% Battlepass Xp and 125 Shells, Normal quests gave 10% Battlepass Xp and 250 Shells, and Hard quests gave 25% Battlepass Xp and 1 Summer Capsule.

Summer Capsules

SummerCapsule
Summer Capsules were exclusive items obtained via Quests, Gifts, and Attendance. They work similar to lost chests were you open them and can receive a variety of rewards.
The rewards as well as their drops chances and possible quantity are:
Shells (100-750) - 10%
Gold (1000-7500) - 10%
Mundane Grimoire (1-2) - 15%
Rare Grimoire (1-2) - 10%
Epic Grimoire (1) - 7%
Legendary Grimoire (1) - 3%
Forbidden Grimoire (1) - 0.5%
Trait Rerolls (1-3) - 10%
Perk Rerolls (1-3) - 10%
Impure Souls (1-2) - 2.5%
Pure Soul (1) - 0.5%
Blank Key (1) - 1%
Gems (2-10) - 0.1%
Ruby Miner Potion (1) - 0.1%
Banner Luck Potion (1) - 0.1%
Mount Catcher Potion (1) - 0.1%
Crafting Luck Potion (1) - 0.1%

Summer Event Battlepass

The Summer Battlepass is the 2nd Event Battlepass introduced to the game. Tier experience is earned by defeating enemies in Event Gamemodes or you can always buy levels for Gems. The Gem cost starts at 100 for the first Tier and the formula for each next lvl is: (The previous tier cost) +10 x (Tier you want to buy -1).

Battlepass Rewards

Tiers 1–10 (Experience needed for each Tier: 3.5K)

Tier Reward
1 x40K Gold
2 x2.5K Shells
3 x7 Trait Rerolls
4 x7 Perk Rerolls
5 x1 Blank Key
6 x1 Pure Soul
7 x6 Impure Soul
8 x3 Materials Crate
9 x1 Lost Chest
10 x16 Mundane Grimoire

Tiers 11–20 (Experience needed for each Tier: 5.5K)

Tier Reward
11 x10 Rare Grimoire
12 x5 Epic Grimoire
13 x3 Legendary Grimoire
14 x1 Forbidden Grimoire
15 x40K Gold
16 x2.5K Shells
17 x7 Trait Rerolls
18 x7 Perk Rerolls
19 x1 Blank Key
20 x1 Pure Soul

Tiers 21–30 (Experience needed for each Tier: 7.5K)

Tier Reward
21 x7 Impure Soul
22 x3 Materials Crate
23 x2 Lost Chest
24 x17 Mundane Grimoire
25 x1 Inverted Spear of Heaven
26 x10 Rare Grimoire
27 x5 Epic Grimoire
28 x3 Legendary Grimoire
29 x1 Forbidden Grimoire
30 x40K Gold

Tiers 31–40 (Experience needed for each Tier: 10K)

Tier Reward
31 x2.5K Shells
32 x8 Trait Rerolls
33 x8 Perk Rerolls
34 x1 Blank Key
35 x1 Pure Soul
36 x7 Impure Soul
37 x4 Materials Crate
38 x2 Lost Chest
39 x17 Mundane Grimoire
40 x10 Rare Grimoire

Tiers 41–50 (Experience needed for each Tier: 13.5K)

Tier Reward
41 x5 Epic Grimoire
42 x4 Legendary Grimoire
43 x1 Forbidden Grimoire
44 x40K Gold
45 x2.5K Shells
46 x8 Trait Rerolls
47 x8 Perk Rerolls
48 x2 Pure Soul
49 x40K Gold
50 x1 Tohi