Final answer:
Omen's Dark Cover (E) ability in Valorant is cost-free. Each round provides Omen with one free charge, and it can replenish over time, allowing for multiple uses in a single round.
Step-by-step explanation:
The cost of Omen's Dark Cover (E) in the game Valorant is actually free. Omen's Dark Cover is a signature ability and, as of the latest updates before the knowledge cutoff in 2023, it does not require any credits to be spent in order to be used. Players are provided with one free charge each round, and the ability replenishes over time, allowing Omen to use it multiple times depending on the duration of the round and the cooldown of the ability.
Omen's Dark Cover is a tactical smoke that can be deployed at long distances to obscure vision, which can be crucial for strategic plays such as taking control of a site or safely retreating. Its strategic use and zero cost make it a staple in Omen's toolkit for creating advantageous situations for his team during a match in Valorant.