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Summary Murders at Karlov Manor introduces a distinct self-contained story, separate from the ten guilds of Ravnica

If, at that time, the creature is tapped, is affected by a spell or ability that says it can't block, or no creatures are attacking that player, a planeswalker controlled by that player, or a battle that player protects, then it doesn't block

In development, the rest of the development team wasn't as excited by it as I was and didn't feel it was worthy of three cards, so they removed it from the set

I tried to translate it with deepL but Im not getting any good results when searching with these on Mercari