It would be nice if the mortar was enabled with Advanced Arsenal. Good idea.
The card gives a dog, improves the life points of the explorer and some ability. The latter is different for each civilization.
Why not award when advancing in age, regardless of the politician with whom you advance?
I can’t think of a better idea.
This card is good for catching the most expensive treasures early, but I don’t know if it’s worth it. If it is worth it, it is very rarely.