Indeed, only a few competitive staples are included here, meaning you will have to combine it with staples you already have to make it more competitively viable (more on that in my upgrade guide)
There's also a handful of other cards that increases power, mostly equipments like Champion's Helm, but most of these bump the power by about 2 and not enough to get most creatures to 7+ power
From large dinosaurs to smaller enemies that love to chip away at opponents, it's easy to see Sphere Grid becoming a staple in plenty of green creature decks
Neatly moving a blocker aside, we'll appreciate the Shuriken giving our creature the +1/+1 counters instead of it being a temporary boost or storing the counters on the Equipment itself, a la Umezawa's JitteUmezawa's Jitte
Finally, the Sapphire and Steel deck focuses on quickly building up a players Inkwell and getting powerful cards that can protect each other onto the playing field