It's possible that this is the object listed as Iron Valiant in a certain expedition journal.
Attack 1:
[Psychic] Calculation Look at the top 4 cards of your deck and put them back in any order.
Attack 2:
[Psychic][Psychic][Colorless] Majestic Sword (100+) If you played a Future Supporter card from your hand during this turn, this attack does 100 more damage.
