No, the next lyric is "I've been a menace, for the longest". This is the oldest menace, unless you count Bestial Menace, which isn't a creature, so was promptly disqualified from consideration.
Yeah, I've been doing the same. I think I just have it floating around in some unclassified section, but it is definitely cubeworthy. I mean, it's vaguely in design space of Electrolyze, while requiring a bit more setup and planning to get value out of.
Also, you can combine it with...
Cursed Scroll for all intents and purposes is a red 1-drop. I wouldn't be averse to filing it as such (with consideration for what type of removal you want this type of effect to be exposed to).
There are a ton of sacrifice outlets. The problem is that decks wanting a 6-drop creature usually don't want them. My RB Aggro / Sac decks almost always top out at 4 or 5. Goblin Bombardment doesn't slot into a control shell.
Further, cube pod decks tend to top out at 6 CMC. You're just...
I will say, I like this approach to Eldrazi design much better. Reasonable CMC, isn't a "remove or die" check. I am sure the bigger ones will be different, but I like the new direction.
Also, it synergizes with JTMS from the original Zendikar. Fateseal to put a non-land card on the bottom, then cast this guy to marginally increase your expected hit rate.