Constant abilities are abilities that are "always on". They can have conditions that need to be met in order to cause certain effects, but constant abilities are not triggered and do not have costs.
Constant abilities continually affect the game as long as the card they appear on is active and any other specified conditions are met. They are not triggered and do not have costs associated with them An example of a constant ability is the card Experiential Data, which reads, "All ice protecting this server has +1 strength."
