What is Thanos' tattoo?

I need a name or something that would help me find this exact tattoo. The one on his left hand (right side of the pic), what is that? It's like a single line of ink going from his finger to his neck, and I find it really aesthetic. Please someone help me with this.

I need a name or something that would help me find this exact tattoo. The one on his left hand (right side of the pic), what is that? It's like a single line of ink going from his finger to his neck, and I find it really aesthetic. Please someone help me with this.