Tahller

Tahller is a fictional term used in speculative fiction and tabletop role-playing contexts to describe a substance, artifact, or currency within imagined worlds. The exact nature of tahller varies by author or game designer, and there is no universal definition outside those specific works. It is not a real-world material.

In many settings, tahller is portrayed as a compact, high-density resource capable of storing or regulating energy. It may appear as a crystalline mineral, a liquid matrix, or an engineered compound, and its properties can enable powerful devices, long-lasting power cells, or advanced propulsion systems. In other narratives, tahller functions more as a cultural or symbolic object, valued for rarity, ritual significance, or status rather than technical performance.

Etymology for the term tahller is unclear and likely arises from creator invention or cross-linguistic inspiration. Because tahller crosses multiple, unrelated works, its in-world science and social role are frequently inconsistent, designed to suit a particular story or game system rather than establish a single, coherent canon.

Usage notes emphasize consulting the original source to understand how tahller operates in that universe, as definitions and mechanics can differ markedly between authors or game rules. The term commonly appears in glossaries, item lists, or lore entries within fictional settings, serving as a flexible device for world-building.

See also: fictional substance, energy storage, artifact, currency (in fiction), lore item.