Assassin's Gambit

Melee attack
At-Will
Target: 
One enemy
Attack: 
Dexterity + Level vs. AC
Hit: 
Half of WEAPON + Dexterity damage (including Sneak Attack damage if any), and if you drop a non-mook target to 0 hp, you can take another standard action this turn.
Miss: 
Damage equal to your level.
Epic Feat: 

Once a turn, you can get the extra standard action when this attack drops a mook target.