The two basilisks take a step towards Beegred and Orubis, but then they immediately change direction and try to rush towards another cave to the south.

(They travel a total of 20 feet with their dash action, taking a total of 16 piercing damage from the spike growth)

(I moved the basilisks before Skameros, since I didn't think it would change anything.  Skameros's turn.)

 Skameros will just hide in the shadows

[Stealth: 8]

Poorly

Grithik watches Skameros quizzically as the bugbear tries to be stealthy while making a lot of noise.  "You know we can see you and hear you, right?"

(End of round 1.  Rodolfo's turn.)

Rodolfo sees the spike growth and notices something moving across the room and goes "OH SHIT!" and starts to back off while his foot catches on a rock and he falls backwards in middle of his magic and the center of the room grows even more chaotic with erupting earth everywhere! (centered roughly in middle of the spike growth)

It's a DEX(15) save for 19 bludgeoning damage and the ground becomes difficult terrain as well.

• Creature@P10 DC 15 Dex saving throw: 2 
• Creature@Q11 DC 15 Dex saving throw: 4 

As Rodolfo stumbles when releasing his spell, everyone hears the frightened and pained cries of the creatures as they are caught in the damaging fountain of earth spouting up from the cavern floor.  When the magic is spent, Beegred and Orubis can clearly see the creatures extricating themselves from the rubble and that a portion of the summoning circle is completely ruined.

(Orubis's turn.  Then Beegred.)

Orubis draws up a magic stone from the floor and whips it at the nearest of the monsters 

Attack: 12 Damage: 6 

Orubis's stone ricochets around the debris raised up by Rodolfo, missing the creatures altogether.

(Beegred's turn, then Skameros)

Beegred again averts his eyes, readies an Attack action if any of the basilisks get within melee range.
No desire to run over Spike Growth to get to them.

(Skameros and the Reptiles are on stage.)

The creatures extricate themselves from the rubble and continue to move towards the south, moving a total of 20 feet (move + dash).  The spike growth does 9 piercing damage, causing the creatures to screech in pain once again.

(skameros's turn)

Skameros just stands there watching them go

Grithik also watches the creatures go.

(Rodolfo's turn)

Rodolfo doesn't look at them, but just shoots a ray of frost that way: (with disadvantage) Attack: 16 Damage: 10

Rodolfo uses 'the force' and kills the nearest of the two creatures.

(Orubis is up)

Orubis whips another magic stone at the farthest beast

Attack: 18 Damage: 7 

(Note:  with disadvantage, becomes a natural 1.  See OOC thread)

Orubis keeps his eyes cast down to his toes while casting his spell.  A stone from the west side of the cavern floats up in the air and whips across towards the east, barely missing Beegred and completely off the mark for the remaining creature fleeing towards the south.

(Beegred's turn)

Beegred is startled by almost getting blasted by Orubis.

If the basilisk is within 25', and if that path does not cross the Spike Growth, then Beegred will charge forward and attack twice with the magic sword and (bonus action) with the magic dagger (all with disadvantage).
If not, then he stays were he is, although a foot over to avoid being in front of Orubis.

Attack rolls (if needed):

Beegred steps aside to make room for Orubis and his flying debris, then prepares himself to fight back if necessary.  

The remaining creature can be heard struggling as it grabs its fallen mate and tries to drag it southward.

(Skameros's turn)