Although, for X spells and such you'd prefer one
Its fairly typical to get offers of a percentage of the market value at these shows
Silverquill Influence Beginning Commander players do well with fewer permanents to worry about and the power of auras exhibit this nicely in Silverquill Influence
He ended up pulling off a truly wild combo where he put down a Starmie, powered it up with Palkias Star Portal ability, used Cross Switcher to bring up my Mewtwo into the Active Position, played Tool Scrapper to remove my Tool Jammer, attached Choice Band to boost his Starmies attack by 30, and then he topped it off with Leon to raise the attack 30 more, giving him the perfect 310 damage he needed to once again OHKO my poor Mewtwo
Whenever a battle takes damage, whether through direct damage spells or by attacking it with creatures, you remove that many defense counters from it
It's also a Rogue which is a very relevant creature type and being unblockable is never bad