Sounds just like a Golgari commander to me
Challenger has a + number which shows how much additional strength this character gets when challenging
A big reason this card is worth finding is that it breaks a Lorcana rule that has been in place since the game started: it allows more than two colors in a deck
To win a game of Disney Lorcana , a player must gain 20 lore
Disney is positioning Lorcana as a title that will be both welcoming to newcomers - Disney fans who may have never touched a card game before - and those who already know their way around Magic: The Gathering or the Pokmon TCG, for example

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