Tier 1 (Hero Level 1)
Gain Stealth when entering Siege Mode or after not taking or dealing damage for 3 seconds while in Siege Mode. Basic Attacks while Stealthed deal 100% more damage.
Patch changes[]
(Patch November 29, 2017) Note: Adjusted functionality: Sgt. Hammer now also enters Stealth after not dealing damage, taking damage, or using an Ability for 3 seconds while in Siege Mode.