As the creature disappears Aiwin focuses on getting out of the cluster they are in. He runs towards Tobin and the a few more feet away. As he stops he just draws two arrows and waits for the Dao to reappear.

OOC:

Movement: 15ft toward Tobin and then 15 ft down.

Action: Hold attack with trigger of Dao reappearing.

Soar holds position, readying an attack in case the daoreappears.

Round Four:
Bazavur
Tobin and Varan
Dao
Aiwin and Soar

Bazavur, Tobin and Varan are up.

Thanks for botting me, that’s exactly what she would do. Could Soar also use a bonus action or a free action to check out the kettle? Anything change about it? Anything else near it, or emitting from it, or still inside it?

Tobin:

As he readied a magic missile spell for when the Dao shows up again, Tobin wonders aloud, “With the earth in the middle of the structure isolated by water, will the Dao be limited to appearing inside the pagoda?  I suppose it might depend on how deep the moat goes.”

Readied Magic Missile:   10 force damage

Bazavur holds his ground next to Tobin, ready to strike at the creature should it appear within ten feet of him. (27 to hit, 14 damage)

Tobin and Bazavur stand at the ready.

Varan is up.

Varan groans using half his movement to stand up, "That thin' hits hard." He will move to be halfway down the bridge; and if the kettle is close by, give it a kick into the moat. As he moves he will give himself a cure wounds.

Cure wounds: Healing for 10 hp.

Daran heals, and kicks the kettle. It was still emitting smoke. Now it is in the water.

The creature appears from the ground, next to Tobin. 

Tobin, your readied magic missile goes off - it takes 10 points of damage.

Bazavur, you are within 10 feet so it takes 14 damage from you.

Soar, it is not within range for you.

Aiwin, you can make one attack only - you can't ready an extra attack I'm afraid. 

After that the creature will take its turn.

Aiwin releases one of the arrows at the creature.

OOC:

31 to hit for 13 damage

You definitely hit the creature.

The creature, on the other hand, definitely wants to hit Tobin. Again it mutters something in its language as its maul smashes down:

First maul attack: 16 to hit, 17 points of bludgeoning damage (but misses)
Second maul attack: 17 to hit, 24 points of bludgeoning damage

Can you block the second hit? I think you used your reaction to ready the missile attack, right?

The creature remains where it is, preparing for its next strike.

Aiwin and Soar are up.

Aiwin just looks at the creature and mutters in elvish as a mark appears on. He smiles letting loose three more arrows.

OOC:
Bonus Action: Hunter's Mark

Attack 1: 26 to hit for 8 damage
Hunter's Mark Damage: 3

Attack 2: 18 to hit for 9 damage
Hunter's Mark Damage: 1

Dread Ambusher Attack: 20 to hit for 5 damage
Hunter's Mark: 6

Tobin:

Having used his reaction to cast Magic Missile, Tobin is unable to block the second attack and gets walloped, HARD.

Three arrows, all on target from Aiwin, doing a lot of damage.

Soar is up.

Soar attacks with an Eldritch Blast, which hits doing 17 points of force damage.

Round Five:
Bazavur
Tobin and Varan
Dao
Aiwin and Soar

Bazavur is up.

Bazavur interposes himself between Tobin and the creature attacking them swinging his glaive with as much force as he can muster trying to get the creature to back away. (27 and 26 to hit for 11 & 10 slashing dmg respectively)

He then casts a quick glance back to the librarian, “Come on, this thing isn’t so tough. You got this.” (BA: bardic inspiration to Tobin 1d6 to ability check/attack roll/saving throw or add the die to a spells damage/healing)

Bazavur's glaive does a lot of damage.

Tobin and Varan are up. Tobin, you have a bardic inspiration die.

Tobin:

Tobin had looked like he was about to run away, but at Bazavur’s encouraging words he stands strong.  Sticking out his tongue at the Dao, Tobin conjures lightning and shoots a bolt through the foe at point blank range.

Lightning Bolt: DC 20 Dexterity Save for Half, cast at 4th level with Bardic Inspiration added for 10d6:  36 points Electricity damage.

Switching back to his longbow, Varan lines up a shot at the Dao's back, "You're one big pain in the backside." He lets the arrow fly... right into the hedge.

Action: Fires an arrow at the Dao, Attack: 9 (oof, that's not gonna hit)

Varan misses... and the Dao narrowly avoids the worst of the lightning damage. It still takes the full half damage though - it's not resitant.

The Dao makes two further attacks, both on Tobin. The first attack is 24 against AC for 25 points of bludgeoning damage. Tobin, give me a STR save, DC 18, or be knocked prone.

(After I know if you're prone, I will make the second attack)

Tobin throws up a Shield to stop the incoming blow, but it is too powerful and hits him anyway (AC 22).

His tiny form is no match for the heavy blow and he is knocked to the ground, barely conscious (Strength save 4).