If a revealed card in the library is perpetually modified by Hydroponics Architect, the perpetual modification part is also revealed.

Steps to reproduce:
1. Reveal cards in your library (I used Duskwatch Recruiter to reveal the whole thing; more lands being revealed increases the likelihood to reproduce).
2. Attack with Hydroponics Architect.

When browsing the library, it now shows which land is being perpetually modified to be an island despite us not deserving to know this.

Usually what happens is that this reveal happens because of Brainstorm. But that needs chance to reproduce.