Stasis Grenade

The freezes all enemies in the screen for 10 seconds. This works in regular battles as well as in PvP combat.

You can periodically purchase a Stasis Grenade from the Itinerant Merchant for 500.

They also become available as a Gem Purchase: 3 Stasis Grenades for 149, once you reach level 25.

Research can be found at Core at first hack

Researching the Stasis Grenade costs 1500, 35, and 2000. The research time is 2 hours. You can reduce cost and time by 20% by catching 20 grenades in combat.

Constructing the Stasis Grenade costs 300, 200, and 600 each. Construction time is 20 minutes.