Its not my personal first choice for a deck to register, but its hardly the worst thing you can be doing in the format
Monstrous Emergence deals damage equal to the power of the creature you chose or the card you revealed to target creature

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Also in that strip of color, though only on character cards, are the card's Strength - how much damage the character deals - and Willpower - how much damage it takes to banish the card from play
While all these decks have sideboards, you wont be able to access those cards without the learn mechanic
The actual problem here is that you dont often want to use this on turn two on draw, because you might need to discard