The sunny giant plays beautifully with fetch lands of course, but also cards like Aura of Silence and Selfless Spirit that sacrifice themselves for the greater good
Cards on the Game Changer list are generally on there because they do one or more of the following: Create a huge resource imbalance Slow the game to a crawl Have limited counterplay Cheat on mana to a degree that is hard to compete with at a casual level of play Remove the natural variance of a 100-card singleton format with efficient tutors that can assemble win conditions with ease Shut off cards, strategies, or elements of gameplay in a way that can be unfun For the full list of cards and reasons why the Commander Format Panel added them as a Game Changer, check out this article
If you happen to control your Commander when you cast it, you get both modes simultaneously, and thats where things get really good
I sometimes use Adobe Photoshop to apply the finishing touches, but most of my work is done in Clip Studio Paint
Fae Offering Tchotchke artifacts have gotten out of hand, but there are so many of them that theyve become the centerpiece of entire decks