Giant Dragon head???

So I'm just grinding my noobie-self in the Fields of Massacre and all this purple smoke shows up. I'm like....uh??? and then a giant dragon/snake head comes out of the ground. It's like super big. I couldn't even fit it all in my screen. Then poof. It disappeared. Asked other people around the area if they saw what I saw but I guess they're all bots/non-English because nobody said a word.



Anyone know what it was? Just curious