With a market price of almost $300, it is not the kind of card you would want to have a full set of
There are plenty of Full Art Supporters, like the Full Art Candice [Serena], and Full Art Wallace [Silver Tempest]
It's literally an Unclaimed Territory 99.99% of the time as spending 6(!) total mana to make a 1/1 Sliver token is such an awful rate that it might as well not even be on the card -- if you regularly activate it then I'd recommend rebuilding the deck, maybe add some more card draw so you have better things to spend your mana on
For other purposes, however, if a card refers to your commander, it means either the legendary creature or the legendary Background enchantment
Limit Cards per Sleeve Fit no more than two cards per pocket page if you want extra protection
As it stands, adding more Goad and more attractive Goad-based Commanders to the format is, in my opinion, a net negative at least until those counterplay cards exist