This is because, if you've dealt combat damage to a player with the Hope of Ghirapur, it can be sacrificed, preventing that player from casting noncreature spells until your next turn, causing serious headaches for any deck that revolves around any card type besides creatures
They'd get a creature on the spot, and the threat to make more, forcing their opponent to come up with two answers rather than one
Honorable Mention: Titania, Gaea Incarnate Titania, Gaea Incarnate is a meld case in which Titania, Voice of Gaea and Argoth, Sanctum of Nature do not animate a land, but Titania, Gaea Incarnate does
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IMPORTANT: KNOWN ISSUE WITH SILHOUETTE REGISTRATION MARKS The feature is incomplete in version 0.35 and does not yet work