In some cases, you can use Sinkhole to destroy a site, set your opponent back, and if your opponent isnt careful with where they cast their minions, you can follow up with Cave-In , Stormy Seas , or Earthquake to remove multiple cards from the realm devastating your opponents board while setting them further behind in board presence
Slaughter Singer makes a good pair with this card, allowing you to pump your double striker
Both events introduce new Manaphy and Snorlax promo cards with other new shop items
Some of their TCG prices can high sometimes, but that is very standard for game shops in my experience, so I don't really hold that against them too much
shuffle the targeted card into the Deck, then you can Special Summon 1 "Attrizrute Thyzilla" from your hand or Graveyard