Matilda raced through the brush, breathless and incredibly angry....but she knew in her heart she had lost the trail and a lot of innocent foliage was harmed as she took out her frustrations on her surroundings.....

" I find you, your dead."

" Stay away from here!"

Ben:

Continuing to race after Matilda, Ben looks for clues ahead of the invisible foe.

Perception:  23

Ben:

"There!" calls Ben, pointing at a leaf in the act of springing back as an invisible creature passes.  Moving forward, Ben pauses briefly to illuminate the location with a vertical column of divine radiance!

Sacred Flame, negates cover, DC 13 Dexterity to avoid:  2

The assassin curses quietly, attempting to dodge the flame. DC13 Dex Save: 12

Tiny and Titaani may act next!  Titaani is losing ground, but Tiny is keeping up. Both have been visually and audibly tipped off by Ben as to the location of the assassin (but must still make attack rolls at disadvantage.)

   Tiny (keeping up with assassin)
√ Matilda (keeping up with assassin)
   Titaani (losing ground behind Tiny)
√ Owlbear: (keeping up with assassin)
√ Ben: (30' behind assassin)
   Lamorna: 3 (vanished)
   Horatio: (still swimming...)
   Assassin (invisible, hiding, dashing)

Titaani skids to a halt, staring at Ben in awe as he summons holy fire. "Woah.." Somewhat distracted, she takes out her boomerang and throws towards where Ben pointed. To hit: 12 Damage: 5

Tiny, however, will continue to dash after the assassin, taking his full movement and action. 

(Edit: Sorry, forgot to use fonts. That was a 12 to hit and five damage originally)

Titaani's boomerang flies through the trees but finds nothing but air near where the fleeing assassin is believed to be.

Then, Matilda, Tiny, and the owlbear stumble into a small clearing after the invisible assassin.

A gigantic, gnarled oak stands at the center. Unlike other oaks in the forest, this tree looks unhealthy and has golden brown leaves. A thick carpet of dead leaves surrounds it, and three rusty sickles lie among the leaves. Standing next to each of these weapons is a bleating goat. Eight tiny houses made of woven twigs are nestled among the boughs of the tree. Squirrels dart nervously around these wee domiciles.

But Matilda only gets a glimpse of this scene before the ground around them erupts into a chaos of vines and greenery, grasping at their feet and torsos.

Matilda and Tiny: make three DC12 Strength saves or become restrained.

Matilda and Tiny: Also make one DC12 Wisdom save.

Assassin: Strength saves 8, 19, 20. Wisdom save: 20
Owlbear: Strength saves 23, 20, 22. Wisdom save: 10

The invisible assassin is restrained, and tries to break free: DC 12 Strength save: 20

The owlbear manages to tear away from the vines, but looks at least momentarily disoriented. 10

Everyone may act (and Matilda and Tiny must make many saves, first.)

Horatio spots a creature on the shore silently watching him swim through the wonderfully relaxing lake waters. He has the body of a great horse topped by a human man's torso, head, and arms – a centaur, Horatio recalls. He is elderly, and has a weary, sad look upon his face. 

Matilda Strehgth Saves: 13   6   16

Matilda takes in the strange scene but her focus is on the man who attacked her unicorn, she slashed at him again.

" Eat him Fuzzy!", she said to the owlbear.

Disadvantaged Attack: 6 Damage: 6

Tiny saves: 17 13 9

Tiny wis save: 13

Ben:

Rushing up the edge of the clearing, Ben sees the writhing tentacles and the predicament of his friends.  Staying as best he can out of reach of the vines, he pulls out his spear and offers it handle-first to the nearest restrained ally, saying, “Grab this and I will help pull you out!”  If no one is within a spear’s reach, he will instead say a prayer that they will be able to escape.

( Help Matilda or Tiny if they are close enough; Bless on them and himself if they are not.)

Matilda:  DC12 Wisdom save: 4  (...or else 10...) 

Tiny and Matilda are both [Tooltip Not Found]. They may use their action on their turn to make a DC12 Strength check to escape, if they choose. (One of you may take advantage from Ben's Help.)

Trapped by the vines, Matilda continues to fruitlessly slash at her invisible foe.

The owlbear dives at the invisible assassin:
Beak Attack: 12. Hit: 9) piercing damage.
ClawsAttack: 18. Hit: 10 slashing damage. 

Tiny, Titaani, and Horatio may act next.

    Tiny (near assassin, restrained)
√  Matilda (near assassin, restrained)
    Titaani (50' behind clearing)
√   Owlbear: (near assassin)
√   Ben: (at clearing, helping)
    Horatio: (still swimming... and spots a centaur?)
    Tree? Goats? Squirrels?
    Lamorna: (vanished)
    Assassin (invisible, just broke free from restraints)

( How far is Horatio from the shore and the figure upon it?)

(Still a good 100' out.) The old centaur watches Horatio swim with a calm, but grave, face.

Tiny and Titaani are up next! Tiny is restrained, as is Matilda, and Tiny is 30' feet away.

A number of small eyes stare out of the squirrel houses. You hear an audible chatter in one. A goat bleats.

The party (sans Horatio) has entered a small clearing containing a massive, ancient oak tree. It looks unhealthy and has golden brown leaves. Three rusty sickles lie among the dead leaves beneath it, and s tanding next to each is a bleating goat. Eight tiny houses made of woven twigs are nestled among the branches. Squirrels dart nervously in and out, and several pairs of small eyes watch from within.

The assassin, broken free from his restraints, remains invisible. (Oh just some rolls: 9, 12)

Matilda feels something probing her mind. (Make two DC12 Wisdom saving throws.)

More vines boil out of the ground. (Owlbear: 9,16;  Assassin: 4, 16)

The owlbear and the assassin are once again caught up in the grasping vines, which continue to pour out of the clearing. (Both are restrained again.)

You hear a number of gasps from near the tree, and a tiny voice cry out in Sylvan (which Ben and Matilda understand): "Oh goodness! More of them!"   

The invisible assassin again tries to wrench himself free. DC12 STR check: 7
Ben should also make two DC12 Strength check or become restrained by the vines.

Everyone may act. Matilda and Ben each have two saves to make.  Matilda, the owlbear, and Tiny are all restrained by the vines.

-------

Meanwhile, Horatio has come within (loud) speaking distance of the centaur on the quiet lake, should he wish to try to communicate with it. The old half-man/half-horse continues to calmly monitor Horatio's progress.

"Hey! This is going to sound crazy, but my friends were talking to a real unicorn when someone attacked it. My friends chased the attacker off but they all ran inland. Can you save my friends? I'm trying to get to them but this is a long swim and that attacker could be real dangerous!"

Ben:

Frustrated that no one took his aid to escape the vines, Ben is surprised when they extend from the clearing and attempt to ensnare him!  

Strength Saves:  21     12

He hears the voice speaking in Sylvan and responds in the same language, “My apologies—we did not mean to intrude.  We were chasing the orc assassin from the League of Malevolence who just attacked the unicorn of the Wayword Pool as we were speaking with her.” 

Persuasion if needed:  13