Swamp Blight

A swamp blight appears as a quivering blob of rancid brown and green mud from which dozens of hateful red eyes peer.

Blights are corruptions of nature's wrath.

Swampy Undead

While a swamp blight can dominate undead in its cursed domain, it prefers to use this power to gather and control undead that would prosper in a swampy environment. When building an encounter with a swamp blight, consider adjusting existing undead to match more thematically with the swampland environment, and avoid using undead that wouldn't make sense in such a region. Adjusting an undead creature's innate spells to be primal spells associated with swampy regions is a great way to achieve this customization.