Round 1 - Party has initiative.
Si'Nat, Rondo, and Cugel let fly but only Rondo's hits. The creature seems to barely notice it.
The creatures close with you and attack Si'Nat and Bertrem, the guys in the front since Rondo stepped back. Attacking with their two clawed hands and attempting to bite, Si'Nat is bitten for a slight wound. Bertrem is clawed for a bit more damage.
Round 2 - Creatures get initiative.
Keeping up the attack, Si'Nat is clawed for a long scratch while Bertrem is slightly scratched. However, this time he stiffens up and can no longer move.