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In standard, if 5 drops are generally bad from the expansion with Loatheb rotated out and strong minions being removed it might see play, especially in neo secret paladin as a play before Mysterious Challenger pulling Competitive Spirit so it depends on the game scale. Might be worth using in a Reno Jackson deck. Likely to not be very useful though from what we know so far. With Death's Bite and Unstable Ghoul rotating out there is a lot less small aoe board clear, although with sticky death rattle minions such as Haunted Creeper rotating out running a Wild Pyromancer will likely be the norm.
In wild this card is garbage and not nearly as strong as the other 5 drops not fitting in classic secret paladin or mid range paladin (besides maybe a single include into mid range paladin especially with reno).