Stasis
From Mass Effect Wiki
Stasis is an unlockable biotic talent available to Adepts and Sentinels. Stasis causes an enemy to be temporarily locked in a mass effect field, freezing the target in place and making them unable to attack. Enemies in Stasis also become impervious to damage. However, if you have the Bastion specialization class then you will be able to kill the target, albeit without seeing a health bar.For more on using Stasis effectively, see the Adept Guide.
On higher difficulty settings some powerful biotic enemies, like rachni brood warriors, can put you and your teammates into Stasis. Like Bastions, they can cause damage while their target is 'frozen' and medi-gel doesn't seem to help. It also puts you at risk from any flying debris, because it becomes impossible to dodge and your shields won't take the damage. The only real defense against their Stasis is to hit the enemy with Damping, then take them down as fast as possible.
[edit] Talent Levels
- Stasis (Duration: 12.5 sec, Recharge Time: 60 sec, Accuracy cost: 80%)
- Increases stasis duration to 13 sec
- Increases stasis duration to 13.5 sec
- Increases stasis duration to 14 sec
- Increases stasis duration to 14.5 sec
- Advanced Stasis (Duration: 17 sec, Recharge Time: 50 sec, Accuracy cost: 80%)
- Increases stasis duration to 17.5 sec
- Increases stasis duration to 18 sec
- Increases stasis duration to 18.5 sec
- Increases stasis duration to 19 sec
- Increases stasis duration to 19.5 sec
- Master Stasis (Duration: 21 sec, Recharge Time: 40 sec, Accuracy cost: 80%)
[edit] Classes
These classes have access to the Stasis talent:

