Battle in the Snowy Land

Battle in the snowy land (South Pole) + wounded Gray + Natsu going berserk = MINDBLOWN!

Gray is badly wounded in the battle against the mysterious silver-haired guy covered with a black cloak (who resembles Lyon). The antagonist comes from mysterious, parallel world and is able to manipulate elements (which is ice here). Natsu’s reaction is absolutely not pretty when he finds his unconscious best friend and rival before his eyes. And the next is…obvious.