The only decks that don't happily auto include a Sol Ring when they can are those like RDW and white weenie (sometimes) where the vast majority of the cost of their cards is R or W mana and not colourless
This ability reminds me of a rare in Red (Raging River) that was printed way back in Alpha that divided grounded creatures into two sides of a River and then they could only block or be blocked by that side, so this is a clear call back to that, but color shifted to Azorius, which makes no flavor sense to me
These cards arent very strong and can be easily overlooked
It is a land, if you need it, but if you dont need the land, it is also a potential removal spell
Ive seen this little 1/1 draw five or six cards before anyone finally points removal at it
Fortunately, there is one that fits into the budget