It is quite a bad card, costing 3 mana and slowly, over multiple turns as the land it enchants gets tapped, Orcish Mine counts down to the destruction of that card
If you have the only artifact in play, playing Manic Vandal might be quite depressing
Rootwater Hunter wasn't as important as the wall, but would make your deck every time none-the-less
If you lose the monarch ability, attacking with Aragorn helps you recover it
In between rounds of the off-site Old School event, hosted by Eternal Central, I was able to play pickup games of Alpha 40 against Bog Agra and Shane Semmens
It does lose the ability to tap for mana if you do this, but since the name changes, you can play another Irencrag and both the mana rock and Equipment will remain on the battlefield despite being the same card