It does not represent Targets unit count, and several detections can belong to the same release wave
(-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
Four and five were often easy targets and hard to design top-end cards for, so seven felt natural, and the reference worked
Evolving Skies has a lot of good art, this Golurk is excellent too: #6 Amazing examples above (especially the evolving family ones, MY HEART), but this was always a fav of mine: Also Jungle Pidgeot, what majesty: And of course this Mewtwo with a very familiar, SMASHING design: #7 I adore this Maushold one too
Its a much more focused kind of sacrifice deck