@Neurotic , the creature has attached itself to you, somewhat like a leech. I'm not sure how attacking it with swords would work, unless your Shadow is attacking...
Umbril slashes at the creature attached to him and hits, but is unable to detach it.
The Cloaker continues to bite at him. It is difficult to tell the results of the bite, but the Cloakers tail also whips and strikes Umbril, who also drops to the floor.
OOC:
Umbril, you take half damage on your own strikes either way due to the CLoakers Damage Transfer. You could have tried to remove the thing with a opposed strength check. 7 damage to Umbril. Bite: 25=[19]+6 Damage: 10 and the cloaker attaches to the target's head, and the target is blinded and unable to breathe while the cloaker is attached. A creature can hold its breath for a number of minutes equal to 1 + its Constitution modifier (minimum of 30 seconds). Tail: 26=[20] + 6 Damage: 11
Even with Action Surge I believe that drops Umbril.