You can only use each effect of "Blackwing - Shamal the Sandstorm" once per turn
Generally, ST11-001-uta players pick one of these as their big threat in the deck: OP04-031-donquixote-doflamingo, OP06-118-roronoa-zoro, OP01-051-eustasscaptainkid-701, P-061-monkeydluffy, and OP06-035-hody-jones
Amethyst/Ruby can be useful for control decks focused on maintaining sway over the board, while a good Emerald/Steel build tends to angle for weakening an opponent by depleting their resources through discard abilities
Powerful slivers like Might Sliver will help close out the game while other slivers like Harmonic Sliver control the board and prevent your opponents from pulling ahead
Across the franchise, the trainer has been seen battling with a Zoroark in Ns Castle, and there have even been suggestions that N himself could be a disguised Zoroark (owing to the Pokmons ability to copycat others)