The extra part of generating mana of any color gets better if you have changelings, aliens, or doctors
In most games, players have access to their Commander on board, making this spell free
Gandalfs Sanction In a spellslinger and/or storm deck, an opponent with a mana elf can just be domed for lethal out of the blue
Recently a Fires of Invention (planeswalker stamp) deck that looks very similar to the one played in Standard a couple of years ago has been posting good finishes in the format, in part because Leyline Binding allows it to play Keruga, the Macrosage as a companion while still having cheap interaction
In all, you get 16 new cards, 74 reprints, and 10 full-art basic lands (five of which are foil)
I have a love-hate relationship with tutors, because I think they create too much repetitive gameplay