Actually, the pagan sign of love and the sign of aphrodite, or venus, was used. the pentagram.
It's also symbolic towards the five different elements the greeks thought made up life - Earth, Fire, Air, Water and Spirit. This concept was used for hundreds of years...
The trident used as a sign of the devils power was a trident: he trident of the greek god of the sea.
And so on...They really tried ^^
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