If this card is sent to the Graveyard by the effect of an "Assassin" monster: You can roll a die, then apply 1 of the following effects based on the result
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
Lapras is a Generation One Pokmon so those tend to be popular, but the Umbreon, Espeon, and Solgaleo Rainbows are valued higher
Whatever game aspect you need to improve whether its mana, cards in hand, or stats in play, Atraxa will help you get there
As you can see, your foe becomes a Monarch this turn when he ETBs, and you cannot swap over after your combat this turn