From Encyclopedia Awesomica
Bind is a skill that is associated with the Summoner class. It is one of the most expensive skills with a base cost of 200 mana. It can be cast on any target, but only has a chance of success when cast on a monster not already bound by the caster. If cast successfully, the target monster is bound to the summoner’s will, and may be summoned into duels by the Summoner.
Success and Failure
The success of bind hinges on four separate variables: the caster’s magic power, the monster’s health, the ratio of the monster’s health to its maximum health, and the monster’s resistance. Health represents a monster’s current vitality, and monsters that are not near death have a very strong will to resist. By wearing a monster down, the success rate of bind will increase immeasurably.