Ok, according campaign setting book (plus dragonmarked book) available spell-alike powers for least dragonmark of shadow are; Darkness 1/day, Disguise Self 1/day, Minor Image 1/day. Also if you want any extra spell-alike ability but wich is differnet from your chosen power from feat pick next Dragonmark prodigy feat. it allows choose one power from following in addition to your already chosen power; Insightful Feint 1/day, Net of Shadows 1/day.<br/><br/>As recomended feats are also following;<br/><br/>Mark of Spell Turning<br/>Prequisite; Any true dragonmark<br/>Benefit; You can as immediate action expend action point to deflect spell back to original caster like whit Spell Turning spell. Max turned level is determiend whit power of your dragonmark. You must expend action point after you get hit whit spell but before any inticated effects, damage or spell save throws are doned.<br/>Least; 1lvl<br/>Lesser; 3lvl<br/>Greater; 5lvl<br/>Siberys; 7lvl<br/><br/>Mark of the Dauntless<br/>Prequisite; Any true dragonmark<br/>Benefit; Cannot be stunned nor dazed. Also as standard action you can remove such condittions from others.<br/><br/>Mark of Deflection<br/>Prequisite; Any lesser, greater or siberys true dragonmark<br/>Benefit; You gain deflection bonus to AC according your mark.<br/>Lesser; +1<br/>Greater; +2<br/>Siberys; +3<br/><br/>Umbral Mark<br/>Prequisite; Any Mark of Shadow<br/>Benefit; You can once per day reroll hide check, this must be doned before you learn results of old roll and you must keep new roll evne if it is worser than old roll. In addition all sneak attacks and critical hits targeted on you can be negated thanks mark protecting you and damage is rolled normaly instead. Percentage of the protection is determined by your mark's power.<br/>Lesser; 25%<br/>Greater; 50%