What are the rules around it
The disadvantage is that it cannot be activated during the opponent's turn, and remains in the field with low status during the opponent's turn
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
With Wrenn and Realmbreaker out, your lands all tap for any color of mana, giving you all the colors of mana you need to cast your spells
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