Changes to the rules starting with the letter G (Graal and Galtran).

Overall, the screenshots are very telling in terms of how any Novice can easily find the location of the Grail from a single obelisk. How many attempts it takes to dig it up is a matter of chance — sometimes on the 20th try, and sometimes on the 1st. Personally, I wouldn't want to be in the opponent's shoes and have to check.

In reality, the Grail is not imbalanced. It's simply random, just like 3-4 Griffin Conservatories for one player and 0 for another. Just like 8 Hives on Jebus Cross for one player and 2 for another.
It's Random. Whether it appears next to you or in the middle of nowhere. Whether Kiril recruits for Tower or not a single warrior, while you're playing mm6a and are about to make contact on the second turn, but have nothing to fight with.
Leave the Grail as is.