holographic meowth card Pokemon #10 Game Boy Color Trading Game Promo Holofoil *Sealed* This attack does 20 damage for each heads 20x Meowth Gem Pack Vol.3 |

As you can see, your foe becomes a Monarch this turn when he ETBs, and you cannot swap over after your combat this turn

This card is pretty good

Threshold checks on resolution for spells, activation for activated abilities, and at each step during combat or game phase where it might be relevant

Whatever game aspect you need to improve whether its mana, cards in hand, or stats in play, Atraxa will help you get there

However, one Dark-type strategy will be able to stick around on the fringes of the format because of how its main attackers all interact with each other and how they can easily disrupt an opponent's setup before they have a chance to attack