There was no doubt that Thanos was one of the most important nodes in this universe's timeline.
So he could not die, at least not at Allen's hands.
Otherwise, it would violate the agreement he had reached with Sorcerer Supreme Ancient One and cause unimaginable effects and interference in the future.
As a Traveler, Allen could not stay here forever, much less keep watching over Earth and fending off ill-intentioned observers and invaders.
He had to ensure that he did not cause too much damage to the original timeline.
To achieve that, he even planned to scatter the six Infinity Stones across the universe again after using them, allowing Thanos to collect them and launch the Infinity War.
Of course, once the snap had wiped out half the life in the universe, Allen would take back the six Infinity Stones.
He would never allow anyone to destroy treasures that were both so powerful and so valuable as collectibles.
As Thanos and his forces vanished from the battlefield, only Odin, Sakura, and Allen remained on Xandar's nearly collapsing surface.
Even Thor had already fled that hellish place in a spaceship with Rocket Raccoon and Groot.
The molten flames rising from deep within the planet were mercilessly swallowing everything around them.
Only the area beneath Sakura's feet remained covered in several kilometers of white Solid Ice.
No matter how high the magma's temperature rose, it could not melt or evaporate it in the slightest.
"Who exactly are you? Why didn't you kill Thanos? Why did you let him go?" Odin stared fixedly at the Orb in Allen's hand and demanded through narrowed eyes.
"Who I am isn't important. What matters is whether you're prepared to pay four billion for the Power Stone in my hand." Allen smiled faintly as he countered with