Chyba Cię słownik poprawił, ja też nie wiem, co to TZ.
TZ - terror zones, drogi Fafnirku.

Nowa nowość, która została wprowadzona w d2:ressurected, a jest niom:
Terror Zones are a new game-option that DRASTICALLY increase Experience gain as well as increase your chances of finding incredibly rare Unique and Set items because every monster in the Zone is much higher Level than they normally are! A Terrorized Zone.
Are Terror Zones in offline mode?
Terror Zones are also available in single player! This means that you can farm your Sundering Charms in offline mode as well.
What do terror zones do?
When playing a Terror Zone-enabled game, every hour, the armies of the Burning Hells will focus their demonic might on specific zones, terrorizing them.
The monsters in these zones will be at least two levels higher than the player's current level or their original level, up to a maximum per difficulty.
Niby niewielka zmiana, a jednak bardzo innowacyjna i zajebista szczególnie dla tych osób, które rzygajo* już miliardami ballrunów/chaos runów.
*
I tak - fajnie by było, gdyby blizzard wprowadził to jakieś 20 lat temu w d2:legacy, mianowicie wtedy, gdy w d2 grały rzydoliony ludzi...