This effect allows cards to be returned from play to the owners hand, which synergizes well with abilities that trigger after entering or exiting play
For this card, two Fairy Energy allows you to take another turn, effectively skipping your opponents next turn
In this case, Iono causes both players to shuffle away their hands, potentially upsetting major plays
Constructed: A format in which you make your own deck Control Deck: A control deck is a deck that uses floodgates, and that aims to prevent your opponent from doing anything that you dont want them to do
If you let them get banished on your opponent's turn they will all put a card into your hand, allowing your opponent to start playing actions again before you'll have a chance to get rid of it
Check out step-by-step how-to-play videos here