At the end of each of your turns, you essentially draw a card from the deck of each opponent with three or more poison counters, which you can then play at any time, using mana of any color
When you can only get one specific Trainer card at a time with Skyla, your decisions become overcomplicated and dont often end well
According to the official stats, Grixis Twin, Affinity and Jund are all topping the metagame with around 10% of the field, but a full 15+ archetypes make up the rest of the field, including Merfolk, Naya Burn, R/G Tron, U/B Faeries, Goryos Vengeance and Amulet Bloom
With that being said, I would not recommend using this card in a deck because neither of Mawile's moves do above average or even average damage
This Gallade deck doesn't feature any new Pokmon cards, but despite the poor type matchup it's well positioned to hurt Giratina decks, or any energy intensive strategies that need time to build up from the bench