Champion Mob

Champion Mobs are regular Minecraft mobs with additional abilities added by Thaumcraft. A champion mob can be identified by their name tag (e.g. "Undying Skeleton") and because they emit specific particles.

Spawning
Every time a mob spawns there is a chance that it will receive the  tag and become a champion. The base chance is 1%, and can be affected by the following factors:


 * The chance is decreased by 2% if the world difficulty is easy;
 * The chance is increased by 2% if the world difficulty is hard;
 * The chance is increased by 3% in the Outer Lands dimension;
 * The chance is increased by 2% in biomes which contains the tags SPOOKY, NETHER, or END;
 * The chance is increased by 10% in "dangerous locations" (some specific rooms in the Outer Lands dungeons);
 * The chance is increased by 1% if the entity is a witch, a wisp, a cultist, or a pech;
 * The chance is increased by 2% if the entity is a taintacle or a watcher;
 * The chance is increased by 3% if the entity is a shambling husk.

For example, in the undergarden biome in the nether (whose tags are JUNGLE, SPOOKY, NETHER) and in hard difficulty, 5% of the spawned skeletons will be champions.

Of the vanilla mobs, only zombies, spiders, blazes, endermen, skeletons, and witches can be champion mobs ; additionally, the Thaumcraft mobs eldritch crab, taintacle, wisp, shambling husk, cultist, watcher, and pech can also be champions, and Thaumcraft bosses will always be champions.

Types
There are 13 possible modifications : bold, spined, armored, mighty, grim, warded, warp, undying, fiery, sickly, venomous, vampiric, and infested.