Re: You shall thwart justice no longer! (PEACH)
He means it's one of the creatures of Mechanus: the Lawful Outsiders that hunt down certain transgressors of the (thought to be) unwritten laws of the multiverse.
They've got a section in the Monster Manual.
I can see this particular Inevitable used for a lot of different campaign hooks... I like the potential it has to be more than just another random encounter.
Flowers blanket all the countryside like freshly fallen snow
I know the answer's waiting somewhere, as it was once long ago
Do you wait to cross the river from the shores of shallow tide?
And what will happen to your phantom if you reach the other side?
...Hear me crying...
Avatar by Kairaven.