[Master] Tremors of Underwild - Discussion & Portal / Summon results

This thread is for information and discussion on the Tremors of Underwild Event, Summon Portal, and sharing Summon Results.

:spiral_calendar: Schedule

For specific start / end dates, check out the calendar for the month. Or the digital_calendar for a longer forecast.

Start Time End Time Duration
Thursday 07:00 UTC Monday 7:00 UTC 4 days

Event information

  • WE is reduced with 3
  • Special rare enemy can appear (Underwild Bat), which may drop Underwild coins, Emblems and Crafting materials
  • Special enemy limit: 15 / day, which cumulates if you do not find any on day 1, then you can find 30 on the second day.

Underwild Bat

  • Underwild Bats can not be attacked when they are Shielded like this:

  • They become attackable just before they attack in the following form:

  • You can see how much Underwild Bats have you find and how much left to be found on the Season IV map:

Monster Lure


  • You can buy Monster Lure, which gives you these benefits:
    • Extra 10 rare enemies which can be found / day
    • Rare enemies always drop Underwild coins above their normal extra loot.
    • Chance to find rare enemies is increased with 1000%
    • It is only active for the current event.

:man_superhero: Featured Heroes

Each Month there are three (3) featured heroes. As yet, there is no clear pattern to accurately forcast who will be the future Featured Heroes.

When a more reliable pattern is known, this section may (?) be updated to include a forecast.

@jinbatsu does an awesome job tracking the past & future (where a pattern is discerned) for featured heroes in this spreadsheet: EP Calendar Quest, Atlantis, Event Logs & Guess - Google Sheets

For links to all the various hero information & discussion threads, please make use of this directory:

🕵 Season 4 (Voyagers of the Underwild) – FAQ & Links

:game_die: Season 4 “Underwild Portal” Appearance Rates

Classic Season 1 Heroes

  • Rare Classic Hero: 19.6%
  • Epic Classic Hero: 11.9%
  • Legendary Classic Hero: 0.9%

Season IV Heroes

  • Rare Season IV Hero: 51.4%
  • Epic Season IV Hero: 14.6%
  • Legendary (non-featured) Season IV Hero: 0.6%
  • Featured Legendary Season IV Hero: 1.0%


  • Legendary Hero of the Month: 1.3%

:money_with_wings: Analysis of Summon Appearance Rates

This table shows the cumulative probability of different Summon events, based on a total number of Summons (1x, 10x, 30x, 100x, 500x, 1500x)

Please note that NO occurrence is ever actually 100%; the 100% entries in the table below indicate cumulative probabilities sufficiently close to 100% that they are expressed as such for simplicity. All other numbers are rounded to the nearest 0.1%.

Monetary Cost Listed working off Gems cost $99.99 US for 10,000. A 30x Summons costs $83.99 US.

Occurence 1x 10x 30x 100x 500x 1500x
US$ Cost of Summons Cost $3.49 $30 $84 $282 $1428 $7139
Any Season 4 (S4) Hero 67.6% 100.0% 100.0% 100.0% 100.0% 100.0%
Any Season 1 Hero 32.4% 98.0% 100.0% 100.0% 100.0% 100.0%
Any S4 5* Hero 1.6% 14.9% 38.4% 80.1% 100.0% 100.0%
Any S4 Featured 5* Hero 1.0% 9.6% 26.0% 63.4% 99.3% 100.0%
Specific Featured 5* 0.3% 3.3% 9.5% 28.4% 81.2% 99.3%
Any S4 Non-Featured 5* 0.6% 5.8% 16.5% 45.2% 95.1% 100.0%
Specific Non-Featured 5* 0.1% 0.9% 2.5% 8.2% 34.9% 72.4%
Any S4 4* 14.6% 79.4% 99.1% 100.0% 100.0% 100.0%
Specific S4 4* 1.5% 13.7% 35.7% 77.0% 99.9% 100.0%
Any S4 3* 51.4% 99.9% 100.0% 100.0% 100.0% 100.0%

Note 2: These odds were accurate at the time of posting in June 2021. The “specific hero” odds will diminish as additional heroes are added to the portal.

Putting That in Perspective

Gems cost $99.99 US for 10,000. A 30x Summons costs $83.99 US.

  • If 1 million players each spent $30 USD & did 10 Summons, 497,884 of those players would NOT get a Season IV or Season 1 5* Hero

  • If 1 million players each spent $281.97 USD & did 100 Summons, 366,033 of those players would NOT get any Featured Season IV 5* Hero

  • If 1 million players each spent $1,427.86 USD & did 500 Summons, 188,351 of those players would NOT get a SPECIFIC Featured Season IV 5* Hero

  • If 1 million players each spent $4,199.58 USD & did 1,500 Summons, 276,300 of those players would NOT get a SPECIFIC Non-Featured Season IV 5* Hero

:dizzy: Bonus Ascension Material Chest


Much like the Season II (Atlantis) and Season III (Valhalla) Summon Portals, The Season IV “Underwild” Portal features a Bonus Ascension Material Chest, which contains a guaranteed Rare or Epic Ascension Material, and can also contain Rare and Epic Crafting Materials.

Also, like Atlantis/ Valhalla, the Bonus Chest fills with each 10 Summons, and there is a limit of 9 Chests per event.

Your progress towards the next chest also carries over to the next Underwild Summon event if you still have chests in stock, just like with the Atlantis / Valhalla Summon.

:gem: Summon Costs

The Summon Costs for the Underwild Portal match the Atlantis & Valhalla Portals:

  • Single Summon: 100 Underwild Coins or 350 Gems
  • Summon x10: 3000 Gems
  • Summon x30: 8400 Gems

:hammer: Underwild Coins

The first time a Stage is completed, a reward is given in Underwild Coins — which are just like Atlantis/ Valhalla Coins, but for Season 4.

Just the same as Season 2 & 3, Normal Mode Stages reward 3 Underwild Coins, and Hard Mode Stages reward 5 Underwild Coins — and there are 10 Stages per Province, so it’ll be the same 80 Coins per Province that Season 2 & 3 had.

Also like Atlantis/ Valhalla Coins, 100 Underwild Coins are required for a free Underwild Summon.

:money_mouth_face: Offers

_Prices in HUF and AUD and included taxes _

Prices in USD (excluding taxes) would be:

Day 1: $29.99, $9.99 & $2.99
Day 2: $3.99
Day 3: $4.99
Day 4: $29.99

:link: Related Threads

Historical Underwild Portal Threads:

Click for historical Underwild threads

Any idea what will cost?

Maybe I’ll ditch the wedding on Saturday :rofl::rofl:

1 Like

It was free in Beta, but it is highly unlikely that it will be Free in the live game.

So I can just guess.
My guess: 4.99 USD
I wondering how accurate will it be :slight_smile:


I guess will see then :crazy_face:

I assume if one wants to buy it, they should do so before farming itself for maxing those extra coins per bat.

Curious about the lure offer, whether it will be alone or bundled with something else (hopefully not >$10). Eh, we’ll see tomorrow. Everyone could get one for free as a compensation for that Kalo screw-up as well.


I think it should be a 4-day event. @PlayForFun

Right I have fixed it.
I have copied it from S4 Master topic.
It looks like it was wromg there too.

1 Like

S04*20 characterssssssss

1 Like

How was The math in beta comparing to Day 4 offer? Did someone calculated it?

They could give Kalo the passive ability, Monster Lure. If you take him into battle in Tremors, you get the same benefits as having bought the Lure. Stampede!

Now THAT would be compensation for his nerf, that wouldn’t affect PvP gameplay. SG’s bottom line, however…

I was waiting - the OP says this starts at 7am UTC, it’s past 7am now, and no event. Does it start later? More like 9am or something?

You got your time wrong, it’s not 7am UTC yet. Just 6 more minutes to wait.

1 Like

Won’t buy it, just posting for reference.


10$ for the lure, anyone?

Monster lure is 10.99€ :scream: (on Android)

That’s about 27 and half € cents per bat (with bonus loot tickets and one WE flask).

It could be cheaper, but at least we’re getting 120 loot tickets.

Regarding the one flask…really? Give us at least 10 if you want us to spend real money for it…

Got lucky today


One flask with tickets and monster lure active :upside_down_face:


28 WE used so far, so about 7 missions:
I already had all of these except Helo. I kept Helo but deleted the rest


2x Bats = 20 coins
(Both in the same mission)

Tome of Tactics from the chest though, I had 0, so I needed that