Gix - Retreats over the horizon

Then Urza loosed two weapons at once: bolts of lightning to counter Gix's last cowardly thrust and a dragon shaped like the one he'd ridden into Phyrexia, but shaped from golden light. Stars shone through the dragon's wings, but its power was anything but illusory. A jet of intense blue fire shot from its mouth as it began a stoop that would take it into Gix's sanctuary lair.

Gix didn't die fighting; nor did he retreat to Phyrexia. Instead he abandoned Pincar City altogether: a relatively small green-gold streak racing to the south, a half-breath ahead of the dragon's flame.

Xantcha expected the dragon to pursue Gix over the horizon, but it continued its stoop into the ruined sanctuary.

***

Planeswalker, Chapter 23