Phaselock

Phaselock is the ability unique to the siren Maya in Borderlands 2 (to be released September 2012). It is not yet certain exactly what the ability will do, however it is thought to be the ability to freeze an enemy in its place and will probably be very usefull to a co-op team as class perks will enable Maya to do damage and heal teamates at the same time while using Phaselock.