I havent personally seen any come released accidentally
It may still be fine in your pod, but just be sure that it wont ruin somebodys entire game
Also, note it's power in any deck, but in tempo, aggro with Anthem effects, artifact and dorks matter like Losheen, Hate Bears, Auras, Equipment, Voltron, +1/+1 counters matter and more this is a must kill on sight guy
It gets even better when equipped, so toss in gear like Sword of the Animist or Sword of Feast and Famine to give Merry first strike and a serious threat level
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I can see many decks eschewing the vehicle part completely and opting mainly for creatures and artifact creatures, and I think thats perfectly fine