Once again, Magebane Lizard is a game-ending threat for this archetype, so red Pioneer decks like Red Aggro and even the combat trick-heavy Gruul Aggro are sideboarding it in
Well, its an Item card, not a Supporter card
Best of all, after Skarmory ex uses its Steel Wing attack, it reduces the amount of incoming damage from the opponent's next turn by 20
Since it's a legendary creature, there is a big chance that you won't see it much outside EDH, and the only other format that could use Myrel effectively would be Modern
This slim build allows smooth shuffling in games
The other issue I see with investing is its hard to grow the demand for Korean since Korea itself is a rather small country and no other countries speak/read the same language