Compared to regular queens, they move more quickly when off the creep (although being on creep still gives them a movement advantage). They do not possess the Spawn Larvae ability. The swarm queen also has the Rapid Transfusion ability instead of Transfusion, which heals a small amount of HP over time, but can be set to autocast.
In combat, swarm queens are somewhat more vulnerable than regular queens since they count as armored units, causing them to take bonus damage from units such as marauders and immortals. Their ground attack deals slight bonus damage against armored units, but they will tend to be ineffective in combat on their own against ground units, and should instead accompany other units such as roaches.
The queen forces a creep tumor out of her bowels.
Alternatively, each creep tumor may create a single additional creep tumor, using the same build time but no energy cost. This changes the tumor's appearance.
Creep tumors can only be created upon the creep, and within a range.
25 11 seconds
11 seconds (can only be used once by a creep tumor)
Swarm queens gain +3% hit points, +1% attack speed, +5% energy regeneration and +1% Biotic Leech per stack of Biomass. Can stack up to 100 Biomass. Passive: Heal 1% hit points per Biomass.
Essence Hoarder: Swarm queens can collect an additional 25 Biomass (summary 125).
The Limitless: Swarm queens can collect an additional 100 Biomass (summary 200), but gain +1.5% hit points, +0.5% attack speed, +2.5% energy regeneration and +0.5% Biotic Leech per stack.
The amount of collected biomass changes based on difficulty and the amount of supply used by the killed enemy unit:
Collect 5 biomass per supply (Casual and Normal)
Collect 4 biomass per supply (Hard)
Collect 2.5 biomass per supply (Brutal)