What is the ability next to spirit summon?

[Bastila Shan]

I saw some in chapter 2 with another ability next to their spirit summon. Needless to say I’m in chapter 3 and have no idea if I missed unlocking this

[Seltin]

Its ure vessel. I only have one vessel at the moment, a piece of gear called the fire mantle. Gives u dmg reduction against fire/scorch. Its an on-use ability

[TyresTyco]

Vessels. Mostly obtained in the "secret area" of the act. The act one secret area for example can be visitied after ringing all 3 bells

Act 2 secret area doing the boar quest

[Bastila Shan]

Oh yeh ok, I rang 2 bells and meant to go back for the 3rd