Final answer:
Viper's Pit (X) in Valorant causes decay to enemies, which quickly recovers after they exit the area, but the recovery is not specified per second.
Step-by-step explanation:
In Valorant, Viper's Pit (X) applies a decay effect on enemies standing within the area of effect. While specifics on recovery rates are subject to game balance and updates, historically, upon exiting Viper's Pit, players begin to regenerate hit points immediately, and the overall health recovers from decay over a few seconds. The exact rate of recovery differs based on game patches and updates, and it is not quantified in increments per second since the decay effect is quickly reversed after leaving the cloud.