The number of pips needed to advance to the next division or rank depends on the players current rank, and the number of pips gained or lost depends on whether the game was best of one or best of three (e.g., standard or traditional standard)
Plus, it doesn't remove itself from the game so you can get it back with Regrowth, Yawgmoth's Will, and other graveyard recursion cards (including Gaea's Blessing, further down on this list)
You can obtain the Klefki (Crown rarity) card by opening Mega Rising: Mega Altaria, Mega Rising: Mega Blaziken, and Mega Rising: Mega Gyarados from Mega Rising set
Blue has some other notables like Moonsnare Prototype (great at enabling Winter Orb), Mnemonic Sphere (Japanese eggs really are the best), and Tezzeret, Betrayer of Flesh, but theyre a little more niche than what weve covered so far