User blog comment:FairyRaven/Fairy Tail Chapter 398: The Final Duels, Review and Commentary/@comment-25107701-20140901185259/@comment-83.255.195.39-20140902112356

Tempesta probably will get out of that ice and attack them after they use his blood to cure Laxus and the others. Thats why Gray froze him now so that the poisoned people can get back to normal.