What are the rules around it
Oftentimes, it will be too much for your opponents to handle
Now, the Oracle text has been updated to say Each player may exile their hand and draw cards equal to the amount of Energy paid this way, which is different than Each player may exile their hand and draw X cards. For more information on why this erratum was necessary, you can take a look here
Everything We Know About The New Cards For Shining Revelry A Few Surprises And Promising Competitive Additions Though it's not yet known exactly how many cards will be included in Shining Revelry, we have confirmation of 17 cards: As you can see above, some of these have Shiny versions for those intrepid or rich enough to track them down
Second-hand / Overseas: Active trading on eBay, Mercari, etc
7 Gardevoir ex Uses Powerful 1-Prize Attackers Drifloon and Scream Tail Make Great Use of Amazing Energy Acceleration Most of the powerful attacks in the Pokmon Trading Card Game cost multiple energy to use, so players need to find a way to work around these requirements or use unique cards to attach multiple energy to their Pokmon in a turn