Like most Pokmon cards, the value of Mudbray depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Destined Rivals)
Nothing special, just the deck thats already been doing well, but my version is built with an actual understanding of the format to play the most of the best cards and to win mirror and semi-mirror matches
The Silver Tempest set launches this month, and it will be the last mainline set for Sword and Shield
He is a bit too niche to merit a slot without the also niche support cards but he is unique, interesting, versatile and fun
If no opponent is the monarch, Queen Marchesa's (long may she reign) ability won't trigger at all