As for other reasons...
it's probably because she wanted him to retrieve it.
Leonard Churchill didn't dawdle and directly asked, "What should I do?"
The Cloaked Figure responded, "The Lionheart Family has already discovered the Alternate Dimension of War Mode called 'The Third Holy Grail War: The Siege of Ironforge.' According to the current intelligence, the Holy Grail has appeared in the plot of this space. This is not a total war; under normal circumstances, the Holy Grail cannot be obtained. However, if you are lucky, you might be able to get it... of course, you might not."
Leonard listened and fell into thought.
This type of large-scale plot-mode Alternate Dimension usually has many associated plot spaces with varying levels of difficulty: low, medium, and high.
And the most important Plot Item would undoubtedly appear in the final space of the highest difficulty.
'Ironforge' sounded like a not-too-small, not-too-large battle.