This time 7 shriekers sprout, which make a lot of noise when you try to approach, so you simply pick them apart from the distance. "Weird things these beans, first a tree now mushrooms. Ok, one more time."

(bean roll: 29). 

(The shriekers award 23 XP to each of us.)

An animate, immobile stone statue in Moni's likeness rises. It makes verbal threats against her. When you come near, it describes her as the most heinous of villains and directs you to find and attack her. Puzzled you all look at each other and decide to ignore the statue for now continuing your process. 

(bean roll: 40)

A campfire with blue flames springs forth and burns in front of Moni's swearing statue. Hardly surprised anymore, you continue to plant another bean.

(bean roll: 17)

Another tree grows. Only this time it turns into a treant!

(even or odd, good or evil, respectively: 3)

The [monster]treant[/spell] listens to the swearing statue and decides that it is right! It glowers at the party and picks up a rock.

(roll initiative! Spark continues to manage the chuul? we are 70 feet away, so even if the treant comes dashing at us it will need more than a turn.)

Treant: Ini 16; HP: 111

Rizo Ini: 15

Spark's initiative: 16

Chuul's initiative: 6

Minty initiative 14

The chuul stands in front of the group and readies a pincer attack to use if the treant comes in range.

The huge treant hurls a rock at Moni, as the statue insists that she is the vilest of all foes, and the treant moves 30 feet towards the group, stopping just before the northern bottleneck passage of the chasm. Though it looks like it will be easy enough for it to step over the chasm with its long limbs. Rizo and Moni throw Fire bolts at the tree.

Attack (Treant): 25 Damage: 16 bludgeoning damage

Attack (Rizo): 17 Damage: 34 fire damage (doubled due to vulnerability)

Attack (Moni): 24 Damage: 16 fire damage (doubled due to vulnerability)

Initiative: 18 Chuul, 16 Treant, 15 Rizo, 13 Spark, 7 Minty (For simplicity I group you together)

The rock hits Moni squarely (4/20), nearly flattening the fiery butterfly spirit under it. In return, Moni and Rizo set large parts of the living tree ablaze (61/111 HP).

Spark runs 10 feet forward and activates her Rite of the Storm, taking 6 damage.  She uses her sling to launch two Magic Stones (which she would have been preparing each time a bean was planted) at the treant.

(Bludgeoning resistance included in these attacks)

Attack: 22 Damage: 9.5

Attack: 15 Damage: 10.5

The chuul runs 30 feet forward, which is enough to attack the treant with its 10 foot reach.

Attack: 13 Damage: 6

Attack: 12 Damage: 4

Rizo yells, “Mnty! Trees don’t mind bolts too much but they can’t stand it to get sliced up. You still got the whip we found?”

(Half damage is rounded down, right? That makes it 9 in total, the other attacks don’t hit unfortunately. 52/111 left)

(How close is the tree?) 

40 feet

Deciding to trust Rizo's judgement, Minty rushes forward 30 feet and tries to teach himself how to use a whip.

Attack: 21 Damage: 9

(A whip is a finesse weapon, how much do we have to add? It als applies sneak damage. I can’t see the tooltip, so I’m not sure it’s there? The treaty has AC16. I thought rogues have proficiency in all finesse weapons, I guess I was wrong, sorry!)

(Since it is a plus 2, it is only minus one relative to the unenchanted crossbow.  Since I had to move to get in range, I lost the advantage and, therefore, the sneak attack.  If there is a next round, it will be easier to hit.)

( ok, I think what happened is that I got fooled by the tooltip for the attack. It told me that you only applied a modifier if 1 and I was like What the heck? But now I’m confident that the tooltip is just wrong… Sorry that it didn’t work out) 

The crazed treant slams two times into the chuul, trying to force passage.

Attack: 19 Damage: 18
Attack: 21 Damage: 16