Talk:Artifact/@comment-50.150.245.225-20130430002801

The only way an artifact bonus can stack is if multiple people in the game have it equipped at the same time.

For intance: energy siphon gives one point of energy regeneration every two seconds. If there are two people in a game and they both have energy siphon equipped, then the rate of energy regeneration is increased to one point of energy every second.

The more players in a game that have it equipped, the higher the stack, and therefore the higher the rate of energy regeneration. Since the base rate is x 0.5 and the highest number of players there can be in a game is four, the highest possible rate you can have of energy regeneration is 2 per second (0.5x4=2).