As they pulled the sarcophagus open, our wholesome heroes saw the fearsome body of a giant bull-headed creature.
"It's a minotaur," said Newt, "and it was killed brutally. These are very rare. I can't believe they would kill one just for a clue."
"Well, we are talking about someone who wanted to wipe out all the fantastic beasts," Tina pointed out.
"Say, if that was his goal," said Jacob, "why didn't he just use his weapon right away instead of hiding it with a series of clues?"
"Would you like me to explain that?" asked Newt.
"NO! No, that's fine!" said Jacob, remembering what had happened the last time Newt had tried to explain part of the backstory. By the way, it turns out Jacob has dementia. This is canon now.
"Now, let's see here..." said Newt, pondering gallantly, "minotaurs live on the island of Crete. Therefore, that must be the location of the next clue."
"That's good to know," said an evil voice behind them.
Newt, Jacob, Tina, and Nagini all spun around and gasped in perfect unison. Grindelwald himself was standing right there in the entrance of the tomb!