What is the main Season 4 bottleneck in Top Heroes?

Oxygen is the main Season 4 bottleneck. Nutrient Boosters upgrade the Algae Pond, the Algae Pond produces Seaweed, and Seaweed upgrades the Oxygen Plant to raise your Oxygen Level.

What is the minimum Season Medal goal?

The practical minimum goal is 8,200 Season Medals for the final milestone reward. Medals past that point still matter for player and guild rankings.

Which Merchant Fleet route is best?

The Shoal to Coral route is the best simple loop because it earns 40 shells in 6 hours, or 6.67 shells per hour. A direct Shoal to Ruins route earns more flat profit but less profit per hour.

Season 4 events

Season 4 Events Guide

Season 4 is an oxygen-gated season with a lot of small daily systems. Use this guide to keep the important loops straight: build Oxygen, finish medal tasks, protect PhantomPals, trade efficiently, and avoid the early rally traps.

Who This Is For

Best for players entering Season 4, guild leaders setting daily reminders, and anyone trying to compete without wasting Oxygen, shells, rubies, or speedups.

Last updated: Jun 2, 2026

Oxygen economy Season Medals Merchant Fleet PhantomPals Bongo Rush Sea Giant

First day priorities

Season 4 starts with resource discipline

The season is not just one event. It is a set of overlapping daily systems that all feed rankings, milestone rewards, and guild progress. Your safest play is to protect your troops early, raise Oxygen steadily, and never miss the repeatable daily medal sources.

Turn off Auto-Rally

Do this on day one before Megalodon rallies start. Joining high-level rallies without enough Oxygen can create brutal hospital timers.

Build the Oxygen chain

Nutrient Booster upgrades Algae Pond. Algae Pond makes Seaweed. Seaweed upgrades Oxygen Plant. Oxygen Level unlocks stronger guard fights.

Cap daily medals

Early daily tasks cap at 50 medals per day. Later the cap rises to 100 medals per day after Stage 2 / Day 14.

Keep Fleet moving

Merchant Fleet works best when you buy, schedule auto-sell, travel, sell, and refill every dock cycle.

Early warning: do not let Auto-Rally carry you into whale-hosted Megalodon fights before your Oxygen catches up. Season 4 punishes under-gated PVE harder than normal boss content.

Quick System Map

Oxygen Drives PVE

Oxygen Level decides how far you can push guards and high-value seasonal boss content.

Medals Drive Rewards

Season Medals feed milestone rewards, player ranking, and guild ranking across four two-week stages.

Rubies Feed PhantomPals

Recall gatherers around each 33.5K Ruby interval so captured PhantomPals are protected at home.

14-day race

Eliminate Threats

The goal is to be among the first players to defeat a Level 30 Guard on the world map. The event is speed-sensitive, so your building timing and Oxygen Plant upgrades matter more than casual progression.

Resource funnel

1. Nutrient Booster upgrades the Algae Pond.
2. Algae Pond produces Seaweed.
3. Seaweed upgrades the Oxygen Plant.
4. Oxygen Plant raises Oxygen Level for higher guards.

Competitive push

Buy the Season Weekly Pass early if you plan to compete.
Keep Oxygen Plant ahead of guard requirements.
Use Seaweed packs only when they unlock a real push.
Do World Boss and Sea Giant Round 1 consistently.

Do not fall behind

Keep Oxygen Plant and Algae Pond moving together.
Do not skip World Boss or Sea Giant attempts.
Check Merchant Fleet Store for Seaweed and Nutrient Boosters.
Coordinate guild Sacred Spirit Altar support for Oxygen percentage boosts.

Progression engine

Season Medals

Season Medals come from daily tasks, long-term quests, and event sources. They unlock milestone rewards and also feed player and guild rankings. The season is split into four two-week stages; medals carry forward, but ranking payouts happen by stage.

50/day early

Early daily tasks cap at 50 medals per day.

100/day later

The cap rises to 100 medals per day after Stage 2 / Day 14.

8,200 minimum

Hit 8,200 medals for the final milestone reward, then keep going for rankings.

Daily medal sources

Bongo Rush
Merchant Fleet
PhantomPal Capture Squad
Ranked Match
Eliminate Threats
Mine Vein Battle
Fishing Break after Day 14

Long-term sources

Sea Giant, World Boss, and Citadel Clash
Citadel Predictions - easy medals, do not skip
Ruins, Guild Race, and hostile GAR attacks
Ruby, Tree, and Wood Guards

Common medal mistakes

Forgetting Citadel Predictions.
Skipping daily quests after hitting an early milestone.
Buying Weekly Pass late if you are competing.
Waiting too long to claim milestone rewards.

Boss and quest loop

Sea Giant Battle

Sea Giant is a Season 4 boss event tied to Oxygen and long-term quest progress. Treat your strongest five attacks as your leaderboard attempts, then use rallies efficiently to finish the 50-attack quest.

10 Oxygen to attack

You need at least 10 Oxygen to attack at full strength.

Best 5 attacks count

Only your five highest damage attacks count toward the leaderboard.

50 quest attacks

Season 4 quest progress asks for 50 Sea Giant attacks.

Host rallies smartly

Starting a rally and sending your own attack counts as two attacks. Joining another rally adds one.

Companion power

PhantomPal Capture Squad

PhantomPals add a new layer of team power. The safe plan is to increase capture odds early, gather in clean intervals, and build faction-matched Pal groups for your main marches.

Priority order

1. Get steady Pal sources. Weekly Pass grants 10 Pals per day if you are spending.
2. Rush PhantomPal Camp to Level 40. Higher camp level improves capture odds.
3. Recall at 33.5K Rubies. Each interval gives a Pal chance, so recall to protect loot.
4. Build pure faction teams. Same-faction Pals unlock stronger faction bonuses.
5. Shift from Secret Realm to Ruby Mines. Once blue Pals are mostly 5-star, Ruby Mines produce better long-term fusion volume.

Legendary Pal note: the reliable path is volume. Legendary Pals come from fusing 1,000 Pals, so do not starve your account by chasing small amounts of high-quality sources too early.

Secret Realm timing

Use Secret Realm heavily while your blue Pals still need star levels. Once most blue Pals reach 5-star, Ruby Mines become the stronger long-term source because they create more raw fusion volume.

Faction teams

Build Gold, Purple, Blue, and other pure-faction Pal sets around your actual hero marches. Same-faction Pal teams are stronger together and should not be mixed casually once you have enough options.

Trading simulator

Merchant Fleet and Docking Route

Merchant Fleet is about velocity, not just the largest single sale. Your ship cycles through four stations daily in six-hour blocks. Buy low, schedule auto-sell, sell on arrival, refill, and repeat.

4 cycles daily

Merchant Fleet runs four six-hour cycles each day.

5 reputation quests

Complete all five reputation quests daily to unlock better goods.

Auto-sell after buying

Auto-sell protects goods when your ship docks at the target station.

Plunder before buying

If your cargo is full, plundered goods can be lost. Plunder first, sell, then buy.

Route	Cost	Revenue	Profit	Time	Profit/hour
Shoal -> Coral	20 Sonic Stones x 5 = 100 shells	20 x 7 = 140 shells	40 shells	6 hours round trip	6.67 shells/hour
Shoal -> Ruins	20 Sonic Stones x 5 = 100 shells	20 x 8 = 160 shells	60 shells	12 hours round trip	5.00 shells/hour

Best simple loop: Shoal -> Coral wins on efficiency. For a clean 12-hour loop, buy Sonic Stones at Shoal, sell at Coral, buy Coral Branches at Coral, then sell at Ruins. This preserves the 6.67 shells/hour pace.

Reputation thresholds

Complete all 5 daily reputation quests. Reputation unlocks rarer goods, bigger ship space, and extra plunder chances at higher levels. Key thresholds called out in the source notes are 700, 1,400, and 2,800.

Plunder targeting rule

Look 2 to 3 stations backward in the trade cycle and target ships carrying higher-value goods. Because plunder takes 20% of each good type, ships with cargo in multiples of 5 are cleaner targets.

Exchange shop reminder

Use Tidal Shells for season resources, extra ship space, and rare items. Extra ship slots are usually a strong early buy when a new Reputation level unlocks them.

Daily mini-game

Bongo Rush

Bongo Rush is a Flappy Bird-style daily source where small movement choices decide whether you lose hearts or farm a cleaner run. The safest pattern is simple: drop first, tap once into the gap, and double-tap only when recovering.

Use the drop line

Let the fish fall, imagine a line just above the lower pillar edge, then tap once as the fish reaches it.

Double-tap to recover

If you fall slightly below the target line, double-tap to rise back into the gap.

Blue hearts stack

Blue hearts can stack. Red hearts do not, so a risky blue heart can be worth more than protecting one red heart.

Score 40 changes pace

The gap is wider early, then narrows around score 40. Use early gaps to settle timing.

Power-up below the gap

If a power-up is slightly below the pillar gap, let the fish drop toward it first. Once collected, use a quick double-tap to climb back into the upper opening.

Tap timing

The ideal tap is slightly above the lower pillar, not at the edge of the gap. Let the fish drop first, then tap once to lift into the opening.

Long-term power

Research and expansion priorities

Tempest of the Tides research

Hold early short research nodes for Guild Arms when possible.
Rush the central path toward the +250 Oxygen Value node.
Prioritize Gear Attribute nodes because Season 4 scales gear HP and Attack heavily.
Push toward Hero Cap Extensions and PhantomPal attribute multipliers later.

Expedition Hall

Normal mode expands from Tier 800 to Tier 900.
Elite mode expands from Tier 600 to Tier 700.
Tier 650 awards a Mythic Carriage Ticket, so push early if your account can handle it.

Daily operating checklist