The Warlock of the Steel Realms conforms to the standard Incarna Warlock.
Eldritch Invocation: Savior of the Vale
Prerequisite: Sacrifice 1 Essence [permanent], 4th level
The Warlock can cast Conjure Woodland Beings a number of times equal to the character’s proficiency bonus per Long Rest; If on the edge of the Dwindor Swamp, then it brings 10 goblins and a Goblin Shaman. The Warlock also knows the words, gestures, and symbols to invoke the protection of the Witch: They gain Advantage on Religion checks made to combat forces arrayed against her or Dunstrand.