If it wasn't self-evident, Stygian Zinogre is my favorite Monster. Here's some fun facts about the best boy:

The prefix Stygian is derived from the River Styx, a river in the Greek mythological underworld which carries dead souls to their fate.

Instead of it releasing thunder balls from spinning, Stygian Zinogre releases one to four red dragon orbs. These orbs home in on hunters, but only in a straight line. If they hit, they inflict Dragonblight on the Hunter. It can only release four orbs when fully charged.

One way to avoid the homing thunder bug attack is to get behind Stygian Zinogre as soon as it sends them out, the thunder bugs will zoom towards player but will crash into Stygian Zinogre, causing small damage.

Like the normal Zinogre, when the Stygian Zinogre is tripped, bugs can be harvested from its back. This will yield Dracophage Bugs instead of Fulgurbugs.

Stygian Zinogre can finish charging by releasing red thunder while walking.
To recover Stamina, Stygian Zinogre will prey on a Popo, Slagtoth or Rhenoplos (depending on where it's fought). It may also eat from a carcass.

Stygian Zinogre can also perform a combo in order to get out of this state. First it will try to charge normally, but just before going into a full charge state, it will try to pin a hunter. If it succeeds, as soon as it lands the first bite it will howl and become enraged.

When weak, the Stygian Zinogre will break into the Secret Areas of the Tundra to sleep, much like the Deviljho and Jade Barroth.

Stygian Zingore's roar requires Earplugs to block.

In an interview, Monster Hunter Producer Ryozo Tsujimoto stated that Stygian Zinogre was one of his favorite monsters, due in part to its color scheme and the fact that Zinogre is "already a cool-looking monster."

Unlike its Thunder-element counterpart, the Stygian Zinogre is susceptible to shock traps, unable to use them to charge its own Dragon-element lightning.

It is susceptible to flash bombs, especially when charging. This prevents the full charge just as the normal Zinogre. However, during its second charge, it may be able to complete the charging even after it becomes blinded.

Because Stygian Zinogre is able to consistently inflict Dragonblight, it is advisable to use a raw damage weapon if the hunter does not have Blight Resist or a significant Dragon resistance. Dragonblight temporarily eliminates a weapon's elemental/status damage, and a raw damage weapon can subvert this problem.