­Goblin Chieftain concept + Coastal Tower body + Aladdin's Ring ability

Creating powerful but fair lands is so hard. Because they're free to put in a lot of decks they easily become either useless or win-the-game. The ability needed to be similar to Aladdin's Ring, and be useful without being impossible to activate. I also tried, "tap eight goblins" as a cost instead of mana. And considered more directly goblin-related abilities.

Why does Aladdin's Ring do THAT anyway? :)

That... looks pretty fair and balanced, actually. Which as you say is kinda shocking on a land ;) I'd expect a separate ": Add " line unless you're going deliberately seriously oldschool with the design.

High praise! :)

I think my conception of "oldschool" is getting out of date now :) Most of the sets I'm most familiar with are from some time ago now...

I did debate that. NOT having some automatic mana production really is a bit of a kick in the teeth. But it also feels like, if it did, there would barely be any drawback in any half-goblin deck. I guess it probably is better to let the card be splashed and tune it another way. And there's not much precedent, but the few "spend this mana only" lands there are recently do all lean to producing too, even if they'd be pretty good without it.