Shifting Domain

[Thranduil]

I was looking at the MTG website today looking at the article about Barry's Land and how it went from a 6th domain land to a spellbook land. And it just made me think, so I've thought of my first MTG dream card!

Shifting Domain
Land
Shifting Domain is all basic land types at all times.
When you play Shifting Domain, sacrifice it unless you pay .

I wasn't sure how to balance it. My main issue with this was that domain on turn 1 seems obscene. So I was thinking that domain on turn 3 didn't seem so bad. But what do you guys think?

I was also thinking, to be even crazier, that, seeing as it has essentially changeling for lands, maybe it could be "Tribal Land - Shapeshifter", but I thought that might be too crazy.

[FM]

I think Tribal Lands are fine, however, it's way too broken. Can you imagine Domain Zoo with a SINGLE fetchland having THIS? Ouch!

[FM]

I've thought about this card again, and I now think it is balanced, after all.