If, during your declare attackers step, one of the permanents you gained control of this way that's a creature is tapped or is affected by a spell or ability that says it can't attack, then it doesn't attack
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The one weak spot is, yet again, green, which has Prey Upon, a card whose stock falls when green is stuck with overcosted threats relying on Convoke or Undergrowth
If you're a new player, you need to play and be relevant to learn and get better, and you'll only do that if you can actually cast your spells