Ancient and Future Pokemon from the Scarlet and Violet video games appear in card form, with Pokemon like Roaring Moon and Iron Hands getting ex cards right out the gate
This card's effect is considered complex by many players, but it basically prevents both players from activating a monster's effect, depending on the number of monster card types on the board (Ritual, Fusion, Synchro, Xyz, Pendulum, and Link)
These came in the Danone yogurt packs back in the day
This is, in fact, probably the most tame thing you can do with the card
Sadly, the precon only comes with 4 legendary lands and I feel this would have been an amazing opportunity to increase the quality of the land base a little more here compared to other recent precons