Sir Dryw
Sir Dryw gets the full attention of the remaining and still able aquatic creatures. The giant frog leashes out with its tongue, which promptly wraps around the nature warrior and drags him into the huge mouth. The sahuagin, that Dryw just attacked, follows and attacks savagely, as does the mutant, who unleashes a storm of claws and teeth upon the knight. Dryw must endure a few hits and now begins to feel the strain of his own wounds. Worse, though, he is now quite restricted and his shillelagh won't be much use for him at the moment.
"Unmouth me, foul creature! Ag! Miscreants! Striking a man while he's being eaten! I shall wreak a terrible vengeance on you all!"
Sir Dryw starts foaming at the mouth, his eyes rolling wildly. He tosses his shield and shillelagh as he he roars, wolf-like fangs growing in his mouth and talons extending from his fingers. As he struggles in the giant frog's maw, it almost seems as if he is deliberately trying to wriggle deeper into the beast's body!
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Sir Dryw sheds his shillelagh and shield (free actions) and wants to pretty much voluntarily wriggle down the giant frog's throat in order to avoid sahuagin claws. I'm not sure how you'd adjudicate this. Sir Dryw had a dagger in his off-hand from before the fight started; he'll keep that. He also goes berserk (free action) and uses aspect of nature to gain natural attacks (standard action):
"The druid gains a primary bite attack (at her full base attack bonus) and two secondary claw attacks (at her base attack bonus -5 and adding only half her Strength bonus on damage rolls). The bite attack deals bludgeoning, piercing, and slashing damage equal to a short sword of the druid's size (1d6 for a Medium druid, or 1d4 for a Small druid), while the claws deal piercing and slashing damage equal to a dagger of the druid's size (1d4 for a Medium druid, or 1d3 for a Small druid)."
I'm not sure if aspect of nature restores hit points the way wild shape does. The text at d20 SRD doesn't say, so my guess is no. I'll leave that up to you. Sir Dryw will get 10 temporary hit points from going berserk.
Assuming he's able, he'll concentrate on a dramatic and gory exit from the giant frog next round.

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