Quickly excavating the Grail.

I think the idea is a bit different (I haven't read the whole thread, it's too long). First, you need to boost the hero so that he has the maximum amount of mana points. One of the best ways to do this is to fire the hero and re-hire him in the tavern (apparently, this is possible on that map), otherwise, use gloves and boots, as usual. Then, stand on the Grail, remove the gloves and boots, accept units from an allied hero (before that, there were only fast units in the army), and press the magic combination F4 + double-click on the hero (this should recalculate the maximum mana points). Then, there is a chance that the current mana points will equal the maximum, and the Grail can be dug up. Well, as I understand it, I might be wrong, and there is a recalculation of the current mana points, not the maximum, so you need to do the opposite. Or maybe I don't understand anything at all... ----- No, it's even simpler.

Step 4. Digging up the Grail Hire Murka, with an Efreet under her (specialist in gnomes). Murka has 2000 MP. Murka takes a Nomad and a Wolf, again transports neutral creatures, visits the obelisk, and moves to the location where the Grail is to be dug up. At this location, Murka has 1500 MP. Buy an Efreet, with a Hunchback under him. The Efreet runs to Murka, gives her the gnome, and takes all the other units. Murka has 1500 MP, and since she has a gnome (speed 3), her Max MP is also 1500; only in this situation can you dig.