(Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Once Lydia Frye has been blocked, increasing the blocking creature's power to 3 or greater won't cause Lydia Frye to become unblocked
Who should pick it: Cube owners, high-volume playtesters, and anyone who wants maximum control over the printing pipeline
Champions of Kamigawa was built around a series of different creature types that each have their own mechanical identity
You can easily remove a big threat someone else controls and play your own one, all in one turn
Any time life gain comes attached to an effect that advances your ability to win the long game its worth a second glance, and Sphinxs Revelation certainly passes the test
Gisela may be a tad vulnerable to Reflector Mage but is likely to be a brick wall against all of the aforementioned while also sporting lifelink, perhaps the most powerful keyword in modern Magic