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{{PreviousEdition}}{{TyranidsPortal}}An '''Adrenaline Sac''' is a [[Tyranid]] [[Biomorph]] available in [[Second Edition]]. The sac is a special container for excess adrenaline which it the creature can use to temporarily enhance its senses, abilities and physical attributes. It is not big enough for extended use and will run out and require refilling after a single use.

*^{{Endn|1}}:[[Codex: Tyranids (2nd Edition)]], {{Cite This}}