They cabal not fear oryx. Hell they even have a task force that would usually fight people like oryx.

Wait what task force? As far as I know the sky burners are the elites.

No they are not an elite unit. They say it themselves in cabal 3 and they are just a scout force. [spoiler]Today, Primus Ta’aun leads from the front. He pounds from bunker to bunker, roaring encouragement. “You’re my cornerstone!” he tells a wounded Centurion, grabbing her by her armored shoulders. “Bear the weight!” He gets back up, into the fight. “Come on!” Tlu’urn snaps at him, running along behind Ta’aun and saying all the cruel things his commander can’t. “You don’t need two arms to fight!” He calls for fire support. Artillery shrieks overhead. On the plains below the Cabal perimeter, Vex march out of the lightning. Torch hammers burst up like mortars and Ta’aun and his bond brother duck behind a burning Interceptor for cover. “This is going well,” Tlu’urn rumbles. A Vex particle beam needles a little hole through the Centurion’s helmet. He falls dead. Goblins swarm over her bunker and then the Goliath tank supporting this bastion fires a main gun round into the mess, killing the Vex, the bunker, and all the Legionaries inside. The concussion knocks Tlu’urn against his Primus. “About as well as expected,” Ta’aun grunts. Tlu’urn laughs. The grind is eternal. Like duty. Ta’aun keeps fighting, out here past the edge of the Empire, because failure is unthinkable. Defeat’s much worse than death. But Ta’aun is so, so tired. Tlu’urn gets up and starts shooting Vex. “You’re not really going to do it.” Even though he’s fully armored, and only a meter away, his voice on the com crashes with static. “You’re not going to go. It’s mad.” The Vex Hobgoblins start firing at Tlu’urn. Particle beams scream and spark off his enormous bulk. Ta’aun yanks him back to cover. A maniple of Phalanx troops rush forward to plug the gap. “I have my orders. Our report went all the way up, and the decision came all the way back.” Valus Tlu’urn’s blank helmet swivels to stare. “You mean — ?” “It came from the Emperor Himself.” Ta’aun can feel the pressure gel pumping against his skin, keeping him insulated from this deadly world, keeping him alive. “I’m ordered to board and capture the Hive flagship. At any cost.” A Vex Minotaur blinks up behind the Phalanx line. Primus Ta’aun’s armor paints the target and he absolutely unloads, putting all his fear and anger and sorrow into the wretched machine. He roars and roars. The Minotaur burns. His soldiers cheer. [b]“That’s a job for an elite unit. Not a few scout legions bogged down in attrition war. We should wait until — ”[/b] “It’s the mission I’ve been given. I will use what I have.” “Mutiny,” Tlu’urn whispers. “You should mutiny.” Oh, to mutiny. To be like Valus Trau’ug, who took his Broken Legion against the Reef — and failed, failed utterly. Duty is victory. Mutiny is worse than death. Even if death seems certain. “No,” Ta’aun says. And that’s that. The Vex are falling back. Together, they’ve held the line.[/spoiler]

Oh yeah. Well the more you know.

It you bread the grimace cards

I do(really hoping you mean read) and I've actually read that one. It's amazing how they can hide an important line of text in a wall of text on a card on a website completely separate from the game. No wonder nobody thinks destiny has a story! ; )

They ran from him though. Phobos.

They were surprised attacked and then they attacked oryx. When an enemy attacks you out of surprise you regroup and then go out and attack. Also tell card was before oryx came to the system.

Cards talking about crota and oryx came before they arrived too

Expect this card is on Mars. There was before oryx came to our solar system. They were running on Mars from something.

They were running in general from something Phobos is mars' moon. That'd explain it You do know Oryx was planned to come attack us when Destiny dropped right?