A creature with soulbond may grant an ability to itself and the creature it's paired with that includes the text "this creature." In such abilities, "this creature" refers only to the creature that has that ability, not the creature it's paired with
If multiple cost reductions apply, the player may apply them in any order
This deck's success, ultimately, will depend on how good it is at circumventing those counters
Graded Card Scanning This deserves its own section because its where the apps differ most and where most comparisons are silent
It's also very good with many cards that would work well with your Commander, such as Mask of Griselbrand, and I can point out a bunch of other options
You can find an effective jeweler's loupe online for $20