Kaya, Orzhov Usurper Id only play Kaya, Orzhov Usurper if I knew there would be ample targets for the -1 ability
But if you insist on talking with the head honcho, have the right connections, and happen to be able to pay north of 30 bucks (talk ain't cheap with these guys!), then they'll invite you to their inner gardens, serve you tangy green tea, and give you a chance to convince Boseiju, Who Endures to work for you
The Adventure side is nice, because Explore can of course help you set things up so that you will draw a card more often with Kellan, and it wont really be unusual to get two Map tokens from the effect
They take flight for the first time in the Pokmon-e trading card game, introducing all-new game and deck building strategies
Only when you reach super late game top deck mode does Mana Leak cease to be a reliable counterspell
Those are bigger effects that encompass this one and deserve their own list