Who is the villain in the TV show "ThunderCats"?

Who is the villain in the TV show "ThunderCats"?
Pacific Animation Corporation/PhotoFest

Just admit it — every now and then you look yourself in the mirror, pretend to hold up a sword, and shout, “Thunder, thunder, ThunderCats Hoooooo!”

When the planet of Thundera was dying, it was up to a last group of cat-like humanoids to find a new home — which they eventually do after 10 “galacto-years” in the form of Third Earth. But the young Lord of the ThunderCats, Lion-O, has actually aged during their trip in suspended animation. Essentially, he becomes a kid in the body of a super buff tiger-type dude.

Luckily, the inhabitants of Third Earth are nice — for the most part. The ThunderCats’ arrival doesn’t sit so well with this villain, who from that moment onward seeks to destroy the ThunderCats and their power. What’s the villain’s name?

Click START below to answer.