User blog comment:Richard Starkey/Rayquaza Vs. Alduin/@comment-4541447-20120818204917/@comment-121.217.184.110-20130521105359

My vote goes to Alduin. Rayquaza is not immortal like Alduin. Alduin can use his meteor Thu'um shout and it doesn't stop unlike Draco Meteor. His shouts can easily bring down Rayquaza. Alduin is basically invincible in the air. You would know if you watched Alduin in battle. Besides Rayquaza can't use Dragonrend so Alduin would stay in the air.