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This combination seems questionable to me. It's better to have either one or the other, but not both together.

You yourself have experienced this. Defense against both attacks and executions. I agree that it's overpowered and excessive; I confirm it.

Added 2 minutes later
I agree that Necromancer is quite strong. It's fine for me, but the discussion about "interaction of effects" will not be limited to just fifty questions.