The double-headed phoenix that fights itself represents Guardians who strengthen each other in the Crucible.
A CRUCIBLE STORY
PART TWO OF THREE
The morning turned to noon as the sky darkened with dodgeballs and filled with the battle cries of children.
When it was over, Lonwabo had tears in his eyes, but he tried his best to stand straight. Runa had a bloody knee and stared wordlessly at the winning team: the two snarling girls from earlier in the morning. The girls lifted an unrefined mass of plasteel, a makeshift trophy, over their heads, and they roared.
Shaxx stared up at the Traveler. It sat, buoyed by a mantle of clouds against a blue sky. It didn't seem to notice him.
"Tell me what you've learned," Shaxx said to Runa and Lonwabo, his faceplate fixed skyward.
They did, and spoke for a continuous three minutes. Shaxx nodded, slowly.
"So you're not mad?" asked Lonwabo. His face brightened.
"You've gained more from this than the victors," Shaxx replied. The three of them looked on as the two girls smashed the plasteel cluster into the dirt, and to the horror of all the other children, it shattered. Runa's eyes narrowed ever so slightly, a dodgeball gripped in her hands. Shaxx continued: "Victory is key to survival. You need it. Need to fight for it. But it teaches nothing."
"Does that mean, in a way, we won?" asked Lonwabo.
"No," Shaxx looked down at him. "No, you were annihilated."