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The Zangar encroachment or Zangar fungal encroachment is the name given to the various fungal swamps found across the shores of Draenor, caused by the Zangar Sea seeking to overtake the land by releasing thousands of spores and slowly growing inland over time. The Zangar sea, and thus the Zangar encroachment, was created from the rotting body of the Sporemound .
One strain of fungus in particular is especially prevalent in Draenor's fungal ecosystem, causing to name it Zangarium Draenormycota. It is highly adaptable, can be found on many of the living organisms throughout Zangar Shore, and is believed to be unique to Draenor. Dr. Ricard also believes that gaining an understanding of the fungal strains in relation to the local ecology will teach a great deal about the various species on Draenor.
Similar to the plant-based Primals, the Zangar encroachment has the ability to infest land-dweling creatures with spores, turning them into mindless fungal slaves, as can be seen in the Crimson Fen. In southern Spires of Arak, the land is being overtaken by the mushrooms that grow underwater, and as a result, strange fungal creatures are sprouting up in the area. Pinchwhistle Point was overwhelmed by the fungus and most of its inhabitants were infested; however, managed to find a cure.
Known fungal swamps
- Crimson Fen in Gorgrond, which was swallowed when Draenor was torn apart by nether magics
- Umbrafen in Shadowmoon Valley, which would later become home to a tribe of Broken
- The Writhing Mire in Spires of Arak
- Zangarra in Talador
- Zangar Shore in Nagrand
- Spore walkers are believed to have evolved over time from the simple organisms that dwell within the depths of Zangarmarsh into the more efficient hunting, killing and eating machines that they are today.
- Fungal giants are not actually made of fungus. The fungal growths over their body is actually another organism living in symbiosis with them.
- Sporelings are assumed to be podlings infected by the encroachment.
- According to , fungal giants and sporelings were created from fungi.
- Several races on Draenor offer excellent pay for the giant mushrooms.
- The Zangar crawlers feed off of the nutrient-rich fungal spores which gives them the distinct coloring of their shells.
Even though the encroachments appear to employ the same manner of infecting victims with spores as the Primals (as can be seen in the Crimson Fen and Pinchwhistle Point), the two groups do not appear to be allied with one another, since podlings can be seen fighting fungal giants on the northern coast of Shadowmoon Valley; in fact, rumor has it that podlings are extremely allergic to the spores of fungal giants. However, there is reason to believe that the podlings were eventually transformed into Outland's sporelings, likely due to fungal infection.
Since most Primals appear to have vanished from Draenor after its destruction, with the exception of a few ancients and treants, but plenty of fungal creatures remain in the Zangarmarsh, it is probably safe to assume that the fungi were victorious in the end.