Whitening will knock the grade down a point or more depending on the amount
The KMC W sleeves were suggested by someone on the forum, but I cant remember who
You're locked in a Standard green midrange mirror, with you playing white-black-green and them playing something that at least looks pretty similar
Unless youve delved deep into the late-game, that four mana is likely to be a huge stumbling block, removing an opponents threat before it ever hits the field
It's worth noting that you cannot use Commander Legends cards in Standard, Pioneer, or Modern formats, though
The 30 Cards: Set by Set What Makes This Lineup Notable The Classic Collection covers every major TCG era Wizards of the Coast through Scarlet & Violet with at least one representative card per generation of rules and mechanics