Question

On Birmingham Sunday the blood ran like wine,

Answer 1

The literary technique that the line above uses is called imagery. It means that the author is using such vivid language to convey strong images in the readers' minds so that they can imagine what they are reading without any problems. You can clearly see in your mind how the blood ran like wine because of the beautiful words the author used to convey his message.
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Answer 2

imagery

is the answer. Hope it helps.