Galingale throws the javelin in his hand at the beast.

Attack: 24 Damage: 6

Then rides forward drawing his glaive as he goes. He'll jump out of the saddle when he's at 10 feet away and make his second attack with the glaive.

Attack: 19 Damage: 8(If he hits he'll use Slasher to reduce the wyvern's speed by 10 feet)

And finally, he'll use his bonus action and polearm master to strike the beast with the haft of the glaive.

Attack: 24 Damage: 7

Galingale launches his javelin straight at the wyvern, which lands straight into the scaled beast's back. Galingale rides toward the screeching pseudo-dragon and dismounts, striking the wyvern with his glaive and again with the haft of his weapon. 

The goats run scared, scattering further from the goat herder. "Come back my children, come back!" The herder chases after 2 of the goats and attempts to wrangle them back into his control. 

7

The second wyvern dives down from the sky towards the goats. Constanza casts Eldritch Blast, firing a ray of energy directly at the wyvern, striking it squarely in the chest. The wyvern screeches and attempts to escape back into the air. A second beam from Constanza strikes the wyvern again as it hovers just above the goats. 

D'ward charges quickly toward the 2nd wyvern on horseback, firing his pistol twice. 2 loud shots ring out. The goat herder winces and ducks for cover. 

BLAM! 16 Damage: 10

BLAM! 25 Damage: 15

The first wyvern rears back and strikes at Galingale with his barbed stinger. 

Stinger. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.

Attack Roll: 9

The target Galingale must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Galingale manages to dodge the stinger! 

Still in a rage, Bran dashes ten feet and jumps high into the air plunging his greatsword into the back of the wyvern. Bran’s face and jaws then take on a beastial transformation that appear wolf like. He bites the wyvern and rips the flesh from its neck, laughing hysterically. (Infectious Fury (Special))

Bestial Soul: Jumping (Special):  Athletics Strength Check 19+8 + Strength Score 18 =45 ft

1st attack: Greatsword 19 to hit. Damage: 11

2nd attack:  Form of the Beast: Bite 23 to hit. Damage: 12

Wisdom Save: 19

The wyvern is in poor shape, bloodied, as it falls prone it bellows a low grunt.

11 psychic damage from infectious fury. Bran laughs, “bwahhhh haha”

The wyvern sighs loudly. 

Rather fires another arrow at the wyvern.

The arrow soars over the horses and finds the wyvern's eye! The wyvern screeches a blood-curdling death rattle as it dies and lets out its final breathe. 

The 2nd wyvern turns towards his fallen ally and roars loudly. 

(Constanza's Turn: Round 2)

Constanza will release another pair of beams with a single swing of the Rod of the Pact Keeper and cast Eldritch Blast on the second Wyvern.

Action: Cast a Spell: Eldritch Blast 

First Beam × Wyvern 2: Attack: 21 Damage: 5

Second Beam × Wyvern 2: Attack: 21 Damage: 4

Two beams of crackling energy streak from the Rod towards the wyvern. The nearest goats are startled as the large reptilian's flesh is charred by the blasts. 

Galingale stares off into the distance, frozen. PTSD perhaps.