When you add staples like Gyre Sage and Farewell, this deck has everything you need in the Bant color identity
Still, some are drastically more expensive than others, or hard to get hold of after limited print runs
Its a much more focused kind of sacrifice deck
(-8: You get an emblem with "Whenever a creature enters the battlefield under your control, you may have it fight target creature." Then put three 8/8 blue Octopus creature tokens onto the battlefield under your control.) I like the ultimate for the Theros block Kiora better
For a full comparison of what makes Japanese cards different, see our Japanese vs English Pokmon cards guide
Four and five were often easy targets and hard to design top-end cards for, so seven felt natural, and the reference worked