Patryn of Elvenshae
First Post
Now, help me, here. If the hidden Grath gets his action triggered on Round 2, he won't catch anyone flat-footed, right? They should be able to completely defend themselves even though they don't know he's there.
Right?
An invisible attacker generally gets to deny his opponents their Dex bonus to AC vs. his attacks. It's similar, but not identical, to being flat-footed.
d20 SRD said:Invisible
Visually undetectable. An invisible creature gains a +2 bonus on attack rolls against sighted opponents, and ignores its opponents’ Dexterity bonuses to AC (if any). (See Invisibility, under Special Abilities.)
d20 SRD said:Sniping
If you’ve already successfully hidden at least 10 feet from your target, you can make one ranged attack, then immediately hide again. You take a -20 penalty on your Hide check to conceal yourself after the shot.
Also, as mentioned, standing up from prone is a move action, and whether you want to count crouched down as prone is a DM call; I wouldn't, but that's just me.
So, on his turn, your Grath could stand up (maybe a move action) and attack (a standard action), and then crouch back down to remain hiding (probably a free action); he'd have to make a Hide check at -20 to do so and remain undetected. Anyone who hasn't seen him is denied their Dex bonus against his attacks, and is subject to sneak attacks, etc.