The Swamp spell can be used to kill followers instantly when they fall into one. It is commonly used to block paths or stop Stone Heads from being worshipped. Swamps will kill 10 followers before disappearing. Swamps can be deleted by the player that placed it by holding Shift and Right clicking on it. Swamps will also be deleted if it falls under lava or water or when a shaman reincarnates and a swamp has been placed on a Reincarnation Site. Ghosts will not add to the kill count of the swamp, but will die themselves.

Hovering over a Swamp with the cursor will show how many people have been killed in it. 

 

You will unlock this spell in level 11, and you can have a maximum ammount of 3 shots at once.

 

Some foggy or swampy areas can be confused with swamps, but they are harmless. Swamps release a weird sound effect, and if your camera is focusing a swamp, you will not hear other sound effects from the game!

 

Swamp is one of the best spells against AI and because it is so annoying, it is usually not used in multiplayer.

 

Although it can be an annoying spell, it has its counters: usinig landbridge will create a bridge to avoid a swamp - and a landbridge costs less than a swamp. Using vehicles can make your units reach their destiny avoiding this spell. Balloons can fly above swamps without danger.