Your plan was well played, but you are mistaken.  While Grey is Avian, he has never left the ground in flight in the vortex.  To add on, no one is on his back.  He holds in his hands the weapon at point blank range.  The chokehold will not be held accountable from these misread mishaps, but the final attack will.

The tendrils dug into the avian who still  was still under the runes presents.  The bird smiled.

"I'll never go down without taking you with me.  I have two things to make sure your dead.  While you have been absorbing my power, you are also absorbing the unstable power of this rune, whether you want to or not.  Both of our power combined can not handle this much energy, and thus, in seconds we with dissolve to dust.  Dynio's heart has to much power for any one no matter what race.  My final trick is this.

Colossal worm

Effect: The soundwaves have not only damaged the target, but attacked the before mentioned awakened monster.  It consumes both Grey and his opponent, and retreats to a nearby portal.

The arena now shook without the vortex's source it crumbles down into rubble.  All warriors in the arena are alright and lord bomber stands in his still intact stand.

"SebastianBusque has defeated Grey.  There will be a time out for teams to switch fighters.  As winner of this round SebastianBusque will now choose what type of arena he would like this rubble to be converted into.  We can not fight in these conditions."

Oswald and Francesca bow to the other fighters.

"Grey was our strongest and you have bested him.  We shall see you in the battlefield again some day.  Now we must travel back to the infinate realm.  Grey's not dead, I let you know that.  I'm sure we can work something out with Demon Eye.  Its not like this is the first time this has happened."

Leadbomber

Attack: Character Switch

Effect: The raiders are sent back, and a new challenger shall appear soon.