The reefclaw scrabbles its way up onto the barge, it will take it the round to reach you though as it's not very good at climbing out of water when there isn't a slope for it to ease it's way up!
Jord, do you want to do anything bar decide what the critter is?
Edmund starts to chant mindwarping phrases as he calls down lightning... with an almighty *CRAAACKKK!!!* a blue bolt lashes down!
Reefclaw's save: 1d20 + 8 ⇒ (6) + 8 = 14 - it hisses as the electricity courses through it unabated.
From above, a hissing pseudodragon calls on the power of a ioun stone and magic missiles sputter down on the reefclaw, pitting its carapace.
The lighting continues to roil and spit around, regardless Ashe steps in drawing his sword and striking at the beast... striking it and severing one of its claws!
It lashes out with the other claw at Ashe.
Reefclaw attack: 1d20 + 20 ⇒ (17) + 20 = 37, damage 1d8 + 8 ⇒ (6) + 8 = 14