Is this goober really necessary

I just built Snake-eyes fiendsmith yesterday and today I am practicing combo lines by watching videos and in the videos they're summoning this guy and I just wanted to know whether I need doomed dragon or not bcuz I'm low on Ur cp and I don't wanna waste It on a card that I don't need.

I just built Snake-eyes fiendsmith yesterday and today I am practicing combo lines by watching videos and in the videos they're summoning this guy and I just wanted to know whether I need doomed dragon or not bcuz I'm low on Ur cp and I don't wanna waste It on a card that I don't need.