Developer Turtle Rock Studios has released the full patch notes for Back 4 Blood's November 2021 update, which is now live. The new update makes dozens of balance changes across the game's campaign and Swarm PvP mode--most notably, the effects of some of Back 4 Blood's best cards have been adjusted.
Overall, it's a healthy mix of buffs and nerfs, with over a dozen different cards affected. Though Turtle Rock doesn't outright say as such, the adjustments seem particularly geared towards
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