Can you guys stop crit-failing?!? 

Faris swings at the merrow, but his (he/him right?) foot slips on a puddle. Falling Prone, you take 4 Bludgeoning Damage. 

AHHH!?! This is like when I play Table Top and roll 3 crit fails against a stupid bear, stop it!

Angoroth ducks under the marrows attack and swings his axe down once more. 

 Attack: 18 Damage: 4

After Angoroth hits the Merrow, it spits onto the deck and says, "You'll all pay for this, I swear it." It then jumps off the side of the boat. 

technically, you guys would each get an opportunity attack (except Faris, who is prone), but I don't think you'll kill, you can try thou... 

(ooc: Does Faris need healing or a save check)

I believe so unless the rules change outside of combat? Im not sure how thou, try killing the merrow)

When the menace jumps off, Erdan run near Farris with a preoccupied expression and says: "Quick Flint! Farris is down he need help!".

Erdan prepare to Help Flint if he try to cure Farris.

Unless someone has a better idea, you can get rid of it with a successful Con Save after a rest, or any spell or feature that would do that. 

Angoroth walked forward and put his hand on Feris.  Healing power flowed through his hand and cured the poison in Feris.

"That should help for now."

Angoroth looked around for the Capitain of the ship.  He saw him still near the wheel.  So he walked over to him and asked "You ever gotten a visit from one of those before?"

(Hey)

The Captain stampers "I-uhh... a few times... yeah? I paid 'em last time. I-er... don't know?"

The island now visible off the bow promises rare wonders. Seaweed shimmers in countless brilliant colors below you, and rays of sunlight defy the overcast sky to illuminate the lush grass and dark basalt rock of the island. Avoiding the rocks jutting up from the ocean, your ship makes its way toward a calm harbor on the island's north side.

A large, open-air temple comes into view, perched on the edge of a cliff high above you. The ship drops anchor at the mouth of the harbor, and two sailors row you ashore. You have plenty of time to admire the towering statue at the center of the temple, depicting a wizened man surrounded by seven songbirds. A long path winds up the side of the cliff to the temple, dotted along the way with doorways cut into the rock.

The sailors set you ashore on a rickety dock, where a large rowboat is neatly tied. They point to the base of the path and wish you good luck before they row back to the ship. Your visit to Dragon's Rest begins!

What did Angoroth use?

He used lay hands on 5 points worth to remove the poison effect.

Faris would be thankful "thank you cleric" the elf fighter would give a alight bow of utmost respect. "You saved my life."