Yeah, I fucking hated this one. I found BRAINTEASER after one guess, but RIDDLE is just positioned right that you can use its R and E to spell out BRAINTEASER. Those are the letters I used, so it didn't count. It was only after a few hints - which I'd like to think I wouldn't have needed if I'd cut off so many possibilities with the spangram - that I realized you could go the direction and spell it plural.
I genuinely feel it was bullshit.
I dunno seemed obvious to me you couldn't go in that direction because you trampled on RIDDLE but the plural/singular shit sucks.
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It says right here in Matthew 16:4 "Jesus doth not need a giant Mecha." https://i.imgur.com/dQgC4kv.jpg