He's also this to Don Thousand, despite the indication otherwise
The value of X is determined only once, as Dimir Strandcatcher's second ability resolves
The five possible combinations you can open here are two uncommons, an uncommon and a rare, two rares, a mythic rare and an uncommon, and a rare and a mythic rare
Guzzlord ex and Nihilego A3a-043 is shaping up to be one of the strongest picks from the set, mainly thanks to its Grindcore attack
On top of all of this doubling up, boxes of Double Masters will contain two Box Toppers, meaning you have a second chance of pulling a really cool alternate card, like the Doubling Season seen below
This is a powerful blue creature because this easily slots into decks that already run most of the pieces it needs