Crossed swords (rapiers) with a coiled snake in the middle, ready to bite. Slytherin House maybe?
“Milord,
I will not thus tamely concede, at your word,
What, a few days ago, I believed to be mine!
I shall yet persevere: I shall yet be, in fine,
A rival you dare not despise. It is plain
That to settle this contest there can but remain
One way — need I say what it is?”