That means unless you have another copy available, you won't be able to activate that effect again
You should be able to make a nice, safe profit selling these into the hype a week or so before the major winter Banned and Restricted announcement
If you're into hunting big chase cards, you should take a look at our guide to the most expensive rare Pokemon cards too
See the storage guide Decide between the Black Bolt 171 and the White Flare 172 before you buy, since they look nearly identical but price differently
Of course, you could also just rely on Energy produced from stuff like Attune with Aether and Voltaic Brawler
The more legends you play in your Commander deck, the better this gets, but thats not even a heavy lift for decks these daysthere are a ton of great legendary creatures that people just slot into the 99 of their Commander decks