Romaine hits with a claw, which does no damage. Iceberg misses altogether. Both slaadi heal to 7 and 6 hp respectively.
Round 542: Iceberg takes 7 points of whirlwind damage and is dying. Johnny moves to 20N55E and deals 11 whirlwind damage to Romaine, so he is dying as well. Then Johnny increases his height to 50 feet, moves north to 65N60E, then west to 65N10E, then north to 90N10E, then east to 90N80E. Only a portion of the easternmost cloud remains, the other two have been wiped out.
Next up for CN in round 542: a chaos beast. (MM) Johnny is at the center of a debris cloud at 90N80E and has 124 hp left.