[request for help] unique provinces ideas

[Jack_Trowell]

Gandalf Parker said:
You can make Dark Vines as commanders. In fact anything can be a pretender, or commander, or bodyguard, or troop.

Oh, I know that I can make any unit a commander, I was just making sure that it was what Agrajag wanted.

But there is a Vine King, and something called Ancient Presence, which you might want to consider.

I know about the Vine king, and it could do indeed a good commander for this province (with or without the Dark Vines), but what is the "Ancient Presence" ?

I don't recall any corresponding summon, maybe it's from a random event ?