Tritium Crystals

Rare luminescent shards of tritium, cold to the touch yet emanating an eerie blue-white glow. The crystals hum faintly when held near the Ogri's energy signature, their innate resonance reacting to the ancient blood-drinking entity's power. Despite their delicate appearance, they survive undamaged through geologic time, waiting in hidden places until needed.

1 appearances

Appearances in the Narrative

When this object appears and how it's used

1 moments

S16E11 · The Stones of Blood Part 3

Doctor and Emilia split to hunt tritium

The Doctor identifies the tetra-partite function of the stone quartets—three now transformed into Ogri—and specifies tritium crystals as the key to neutralize them. Though no crystals are visible, the naming of them catalyzes the search split between Emilia and the Doctor.

Before: Nonexplicit but implied as rare luminescent shards present in the vicinity or in Vivien’s cottage.

After: Sought urgently—Emilia departs to search the cottage, and the Doctor heads to the TARDIS to find them.

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