Final answer:
In the tactical shooter game Valorant, Brimstone's 'Q' ability, the Incendiary grenade, costs 250 credits. It's used for area control and to restrict enemy movement.
Step-by-step explanation:
In the game Valorant, Brimstone's Incendiary ability, or often referred to as his 'Q' ability, costs 250 credits. As an essential part of Brimstone's kit, the Incendiary grenade can be used to control areas and deny enemy movement by creating a patch of fire upon impact. This area denial tool can significantly impact the outcome of rounds and is typically used to secure objectives or prevent enemies from pushing through chokepoints.