Call of Duty: Black Ops Cold Waris continuing to unveil new Zombies details for its highly anticipated Season 2. In addition to addingnew weapons for Season 2, the season introduces a whole host of changes to the Zombies meta including new Skill upgrades, opening players up to a realm of possibilities.
Developer Treyarch’s fifth entry in itsBlack Opsseries launched back on Jul 29, 2025. While the franchise does usually harbor its fair share of critics,Call of Dutyis as successful as its ever been, withBlack Ops Cold Warnow one of the best-selling gamesof all time.
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Detailed in a blog post onCall of Duty’s website, the latest batch of intel looks to add plenty of dimension to Zombies whenBlack Ops Cold WarSeason 2 launches. Among several other things, Season 2 will see the addition of Refined and Flawless Aetherium Crystals, which will enable players to increase their Skills to tiers four and five across the board. The new abilities and stat buffs provided by these new tiers giveCall of Duty: Black Ops Cold Warplayers all new strategic options when dealing with the undead horde. Each of the four Skill categories possess a lot of new tier information.
Tombstone Soda: Players will first be able to spawn near the end of the current round as opposed to the beginning of the next, and won’t lose any of their perks (excludingthe Tombstone perk itself) should they get downed when fully upgraded.
Jugger-Nog: The fourth tier increases Tank viability by further reducing armor damage, while the maxed out Jug essentially acts like a second life, allowing the consumer to keep 1 HP rather than being downed after taking damage.
Speed Cola: Barricade repair and Mystery Box roll speed increases at Tier 4, while Tier 5 is a survival game-changer. The maxed out Speed Cola gives players the ability to both reload and hip fire, even when at a full sprint.
Quick Revive: The first new upgrade gives both players a five-second speed boost after a revive, while the final upgrade grants a shot at self-reviving, if they can kill an enemy while downed.
Stamin-Up: Tier 4 lets players use equipment while sprinting, while the final level entirely eliminates sprint slowdown, making slipping out of harm’s way easier than ever.
Elemental Pop: After a major elemental damage buff for the fourth tier, the maxed out Elemental Pop grants players an Electric Cherry-esque effect, which increases in power the lower a player’s clip is upon reloading.
Deadshot Daquiri: Featuring upgrades that compound on one another, the fourth Deadshot upgrade boosts critical damage by 10 percent. Tier 5 grants a consecutive hit bonus, which should prove overtly effective against stronger enemy types.
Ammo Mods
Call of Duty: Black Ops Cold WarSeason 2’s ammo mods all follow a similar path, simply cranking up their effectiveness range. The now-five mods will be able to affect special-type enemies at Tier 4, and all have their effect become more widespread at Tier 5. For example, the fully upgraded Brain Rot will give players control of three zombies instead of one, which could prove especially effective in the newOutbreak mode, which was accidentally playable early.
How to Earn Refined/Flawless Aetherium Crystals
Given that the Refined and Flawless Aetherium Crystals are more advanced than the raw, the requirements to earn them are more advanced as well. Whilefarming regular Aetherium Crystalscan be normally done by getting to Round 10 and doing an Exfil, the round requirement will be higher. However, the blog doesn’t give a specific number, so it may be somethingBlack Ops Cold Warplayers have to survive long enough to find out.
Call of Duty: Black Ops Cold War’s Zombies experience is continuing to become deeper. In fact, there have been recent rumors that astandaloneCall of DutyZombies video game is in development, a sign that the popular mode may soon take on a life all its own.
Call of Duty: Black Ops Cold Waris available now on PC, PS4, PS5, Xbox One, and Xbox Series X/S.
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