At 15th level probably special mark that does not count against regular limit and has unlimited range (or at least extending to the whole plane). It will probably have a limit that it can be placed on a target once per day but it will allow using shadow lashes and mark-dependent knacks from anywhere on the same plane.
19th level we'll see... (extraplanar range to the special mark perhaps? second special mark?)
So a hex-like mark, that could work.
I think that it was already suggested by someone in this thread but I am too tired to look through the posts at the moment.
The special mark (and possibly the regular ones too) will be probably removable with break enchantment and maybe remove curse.
Other candidates: darkwalker, darkstrider, nightstrider, shadewalker or shadestrider... Nightwalker is already occupied. I am trying for a name that would look well as single compound word. Shadowwalker has that unseemly double w.
Considered Gloomwalker?
Gloomwalker... Gloomwalker. I am not sure of it but I'll consider it.
Nightstrider will be probably off the list because it's too much like Nightrider. Also the repeating t is weirdish.
My personal favorites at the moment are darkstrider and shadowstrider.
Elusive Shadow (Su): Each shadow mark on a creature bestows cumulative -1 penalty to attack rolls and Perception checks made against the marking stalker.
Also, I want to find another term in place of knack. I'd like to save "knack" for purely non-magical abilities of a sage-like or master-like class (master was a skill-focused base class from one of 3rd edition Dragonlance books). I am thinking about simple "shadow/shade powers".
Re: name - Kobold Press has the Shadowsworn base class in the Player's Guide to the Crossroads. Hmm. How about Shade? Shadowfade?
Re: knacks - techniques?
I think you've got some cool stuff here. Have you considered doung some stuff with shadow-pinning (striking a shadow to keep the person it belongs to from moving, at least without a strength check)? Also, if the shadow lash does physical typed damage, knacks or feats to make it do different types of damage or pass different DRs or maybe even emulate elemental effects could be useful, I know you have some of that but just to be considered.
Greater Shadow Mark (Su): At 15th level, a stalker spend one shadow mote and take a standard action to place a greater shadow mark upon a single creature or object within line of sight. The stalker can have only one greater shadow mark active at any one time but it does not count against the limit of regular shadow marks and it isn’t subject to their distance limit.
I finally decided to change the name of the class from stalker to shadowjack. There was published a base class named stalker quite recently.
I am working on shadow weavings, favored class racial options and thinking what powers could be placed at 17th and 19th level. I think that I wrote one or two new shadow knacks since the last update.
"Shadowjack" is fantastic Drejk!
Obviously, immediately after blowing away dust that gathered on this class, I started working on different class :P
Gloom Wave (Su): At 17th level, a shadowjack can spend one shadow mote as a standard action to place one gloom mark on each enemy within line of sight. Gloom marks work like regular shadow marks in all respects, including dissipation range, except they do not count against regular shadow mark limit and untriggered gloom marks dissipate harmlessly at the end of the following turn.
Superior Shadow Mark (Su): At 19th level, a shadowjack affecting target of his greater shadow mark with any ability that would remove the mark can spend one additional shadow mote to prevent removal of the greater shadow mark.
A total of thirty knacks is currently written. Shadow weavings still need to be finished.
I will make a neat google drive file once I finish shadow weavings and suitable set of favored class options.
You gonna post this thing?
So Shadow Lash can be used as a swift action and with normal iterative attacks?
Sorry, I haven't seen this post earlier - the thread was probably pushed out of recent threads by other threads before I could see it.
So Shadow Lash can be used as a swift action and with normal iterative attacks?
I am not sure what you mean by "and with normal iterative attacks" - it is a standard action. After reaching 5th level, a shadowjack can use it as a move action instead and after reaching 9th level, as a swift action (note that it isn't a must, 9th level shadowjack can still use it as a standard/move action if he wishes to save swift action for something else).
When it is used as a swift action, the shadowjack can use it in the same turn as a full attack action, for example making a full attack with two light weapons - which could possibly allow placing multiple marks before or after using Shadow Lash.
You gonna post this thing?
I haven't finished weavings yet :(
I don't want to put a link to temporary files because of 1 hour edition limit that will prevent me from removing the obsolete link once I will have finished file available elsewhere.
Shadow Stalker class is officially superseded by shadowjack. The primary change, aside of name, is simplification and reduced role of shadow weavings (only one shadow weaving active now). During the development shadow weavings became focus of a separate shadowshifter class, which will be revealed at a later date.