Arrival at Nurok
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Attack 1: 9 Slashing, 4 Cold, 15 Radiant
Attack 2: 8 Slashing, 5 Cold, 11 Radiant
Action: Cast spell up to 60' distant. Bonus action: move sphere up to 30' Duration: sphere will stay in place unless otherwise moved by the caster for up to 9 additional rounds.
Rolls
Flaming Sphere damage (ref save halves) - (2d6)
(11) = 2
Rolls
Constitution Check - (1d20+4)
(6) + 4 = 10
(Moving to AK:16, just opposite Ilwyn again.)
Rolls
Greatsword 1 - (1d20+7)
(14) + 7 = 21
Greatsword 1 (Adv) - (1d20+7)
(14) + 7 = 21
Greatsword 2 - (1d20+7)
(8) + 7 = 15
Greatsword 2 (Adv) - (1d20+7)
(18) + 7 = 25
Greatsword 2 Damage - (2d6+6)
(62) + 6 = 14
Greatsword 1 Damage - (2d6+6)
(36) + 6 = 15
There is no need to watch hour by hour, amigo. All I have asked is that people check daily to see if they need to post. With regard to the area around the troll, all of the wolves are now gone, except one that is dragging Merriweather toward Hraefn. As for your spell, the Flaming Sphere spell merely says you cast it in any unoccupied space of your choice. Thus there is no requirement to be on the ground. As long as the location chosen is within range of the spell, 60', you are fine.
Edit: Reading the description regarding being able to move the sphere over a barrier up to 5' high, I retract my height comment. You can keep it up to 5' off of the ground, so keeping it above water is fine.
Merriweather
1 failed death save, 1 successful death save
Rolls
Troll Dexterity Save - (1d20+2)
(3) + 2 = 5
Anyway, the wolves are at AL15 AM15 AN15 AN16 AK17 AK18 AL18 AM18. Gonna leave a whole bunch of rolls here. Also standing by Wildshape just in case.
Rolls
Wolves' Initiative - (1d20+2)
(5) + 2 = 7
Wolves 1-4 Attack - (1d20+4, 1d20+4, 1d20+4, 1d20+4)
1d20+4 : (11) + 4 = 15
1d20+4 : (7) + 4 = 11
1d20+4 : (7) + 4 = 11
1d20+4 : (10) + 4 = 14
Wolves 1-4 Attack (adv) - (1d20+4, 1d20+4, 1d20+4, 1d20+4)
1d20+4 : (11) + 4 = 15
1d20+4 : (14) + 4 = 18
1d20+4 : (7) + 4 = 11
1d20+4 : (3) + 4 = 7
Wolves 5-8 Attack - (1d20+4, 1d20+4, 1d20+4, 1d20+4)
1d20+4 : (15) + 4 = 19
1d20+4 : (3) + 4 = 7
1d20+4 : (1) + 4 = 5
1d20+4 : (20) + 4 = 24
Wolves 5-8 Attack (adv) - (1d20+4, 1d20+4, 1d20+4, 1d20+4)
1d20+4 : (11) + 4 = 15
1d20+4 : (17) + 4 = 21
1d20+4 : (20) + 4 = 24
1d20+4 : (4) + 4 = 8
Wolves 1-4 Damage - (2d4+2, 2d4+2, 2d4+2, 2d4+2)
2d4+2 : (43) + 2 = 9
2d4+2 : (31) + 2 = 6
2d4+2 : (44) + 2 = 10
2d4+2 : (21) + 2 = 5
Wolves 5-8 Damage - (2d4+2, 2d4+2, 2d4+2, 2d4+2)
2d4+2 : (34) + 2 = 9
2d4+2 : (21) + 2 = 5
2d4+2 : (42) + 2 = 8
2d4+2 : (31) + 2 = 6

Rolls
Troll Recharge for Whirlwind Attack - (1d6)
Rolls
Flaming Sphere Rd 2 Dmg, Magic Missile damage - (2d6, 5d4+5)
2d6 : (34) = 7
5d4+5 : (41411) + 5 = 16
Edit: ohh boi thats a crit
I'm assuming attack 2 misses, but attack 1 deals 59 piercing.
Rolls
Attack 1 - (1d20+5)
(20) + 5 = 25
Attack 1 (Advantage) - (1d20+5)
(10) + 5 = 15
Attack 1 Base Damage - (1d8+15)
(7) + 15 = 22
Attack 1 Extra Damage - (4d6)
(1216) = 10
Attack 2 - (1d20+5)
(8) + 5 = 13
Attack 2 (Advantage) - (1d20+5)
(4) + 5 = 9
Attack 2 Base Damage - (1d8+15)
(8) + 15 = 23
Attack 2 Extra Damage - (4d6)
(6662) = 20
Colossus Slayer Extra Damage - (1d8)
(5) = 5
Colossus Slayer Extra Damage CRITICAL - (1d8)
(8) = 8
Attack 1 CRITICAL (Base) - (1d8)
(2) = 2
Attack 1 CRITICAL (Extra) - (4d6)
(5511) = 12
Before the step falls, however, its eyes go wide as an arrow pierces the center of its back, blasting out from its chest and coating Caedwyn in blood and innards as a gaping hole is left where its heart once was. Turning slowly, as the life drained from it, the troll's eyes see a defiant Etna standing there, her bow in hand, a slight smile crossing her face. It is unable to see her for long, as immediately after the arrow strike a series of green streaks flash in its face as Bram delivers five magical missiles. The arcane darts pummel the three heads, one of which explodes in a mass of bone and brain, driving the troll into the water behind it.
With a death knell, the troll falls backward into the stagnant river water, sending a tidal wave over the surrounding shores, soaking the body of Merriweather and splashing over Caedwyn, partially washing away the troll matter covering him.
The sounds of combat slowly fade as the troll lies partially submerged in the water. As you catch your breath, the sounds of the river and forest slowly come back.
Caedwyn
You have suffered a serious injury that will reduce your dexterity by 2 points until you get a Restoration of some kind.
Merriweather
You have suffered a critical injury that will prevent you from using any two-handed weapon. Additionally, you will not be able to utilize your Uncanny Dodge ability as your legs are too damaged. Both of these can be rectified by a Greater Restoration
Rolls
Intelligence test to know anything about Trolls (18) - (1d20)
(14) = 14