Shock Lands, Hallowed Fountain, Watery Grave, Overgrown Tomb and the rest, do the same job with one small catch, you take two damage on entry unless you let them come in tapped
A physical item is sent to a third party to assess its value
In addition, CGC Cards holders stack perfectly with the holders used by CGC Trading Cards and CSG, so your entire collection fits seamlessly together literally
They essentially negate all combat damage coming at you, althoughtrample can still be a problem
Brainstorm continues to shape blue-based strategies today thanks to its immense selection and filtering power
In terms of suggestions you could probably go 20 or 21 lands in a deck where lands matter so much