I tried shouting the following: Bibbity bobbity boo, abra cadabra, hocus pocus, alakazam, klaatu barada nikto, open sesame, presto chango, sim sim sala bim, wala wala washington, azarath metrion zinthos, and mecca lecca hi mecca hiney ho. Nothing.
I tried several lines of Klingon. Yes, I know Klingon, at least enough to get by at scifi conventions. Yes, yes, I'm a fucking nerd. Get over it. Anyways, it didn't work.
I made a series of hand gestures, up to and including throwing the goat, and making the rocker, the spocker, and various others others. No go.
I shouted "Hastur Hastur Hastur" as loud as I could. Suddenly, the skies rained blood, and a hole opened in the sky. A yellowish figure descended from the abyss beyond time, at once a humanoid figure in a yellow robe and a tentacled mass that hurt even to look at. It landed in front of me, and said, in a voice like a thousand screaming souls, "'Sup." Clearing my throat, I said, "Sorry, wrong number." The figure shrugged, then said, "It happens. No big." He/It then jumped back up into the sky. The hole vanished, as did the rain of blood, as if it had never been. I made a note to never, ever, forever do that again.
I pretended to be holding a sword, held my arms up high, and shouted, "By the power of Grayskull!" That worked exactly as well as you would have thought it would. Same with "Thunder, Thunder, Thunder, Thundercats! Ho!" "Shazam" too. I considered doing the "Ancient Spirits Of Evil" thing, but after 'Hastur Hastur Hastur', I wasn't ready to try anything that, you know, might work in the worst way possible. I did try "AMAZING HEADBAND OF JUSTICE IN PLACE, AMAZING ARMOR OF JUSTICE PROTECT ME!", but I couldn't do that one with a straight face.
I tried to do a hadoken, a kameamea, and the reigun. Nope. Not even a spark.
https://www.fimfiction.net/story/237992/8/who-is-this-lord-tirek-you-speak-of/but-i-swear-to-you-im-not-lying