# Chance Spawns 🎲
What do people mean by "chance"?
There can be many layers of RNG to spawning. But some S ranks have more layers than others.
All S ranks, with the odd exception of Croakadile and Mindflayer, have a window of time in which they can spawn. Within that window of time, there is a hidden timer set on the server side. No one knows what the hidden timer is (except for post-maintenance links, explained later on); it can be at 0 minutes past the window opening, anywhere in the middle of the window, or even right at the cap of the window. Once this point has passed, the S rank can be spawned.
In some cases, that is what people refer to as the “chance,” since the hidden timer is randomly set. In other cases, the “chance” is referring to another layer of RNG…
# Chance Spawns
Even if the hidden timer is ready, the chance of the S rank spawning upon attempting is still random. We know this because there have been instances of the window being capped and still having failed attempts. It is recommended that you do at least a few attempts at a time.
- Croque-Mitaine
- Bonnacon
- The Pale Rider
- Agrippa The Mighty
- Lampalagua
- Wulgaru
- Bone Crawler
- Bird of Paradise
- Thousand-Cast Theda
- Zona Seeker
# Guaranteed Spawns
If the hidden timer is ready and the spawn conditions are met, these are guaranteed to spawn.
- Gamma
- Burfurlur The Canny
- Aglaope
- Narrow-Rift
- Kaiser Behemoth
- Salt and Light
- Ophioneus
- Tyger
- Senmurv
- Orghana
- Nunyunuwi
- Leucrotta
- Ruminator
- Okina
- Sphatika
- Udumbara
- Ixtab
- Minhocao
- The Garlok
- Safat
- Gandarewa
- Croakadile
- Mindflayer
# Unconfirmed / Debated
- Gunitt
- Brontes
- Tarchia
- Chernobog
- Armstrong