The ability to sacrifice it to tutor any other land in a player's deck is certainly powerful, though an effective 4 mana (3 + tapping Urza's Cave) to activate is a steep cost in a format as potentially fast as Modern
This can be used politically to allow you to get away with playing a powerful creature or asking for a favour from an opponent
If youve been looking for the coolest-looking Angel Wizard in the universe, youve found it, with double tokens, flying, and lifelink
Opal Palace [Cat deck]: That's pretty good
For example, if you sacrifice Carrot Cake in order to forage, you'll still create a Rabbit token and scry 1
U/B God-Pharaohs Gift decks have been popular in the past and Stitchers Suppliers self-milling ability looks to be a perfect inclusion for that deck