Fear tokens, gained when stress dominates, are the GM’s currency to spend.
Tokens spent in this way are placed into the knowledge coffer at the end of the conflict, after the roll is entirely resolved. This means that fear tokens that are converted into knowledge can’t be used immediately to counteract the fear expenditure.
On any roll, the GM may spend a token of fear to add a six to any of the pools in play, or to remove a six from any of the pools in play. Doing so may change which pool ends up dominating, since it will alter the strength of the targeted pool. This reinforces the inherently dangerous nature of magic use in Riga.