digimon card game: next adventure booster box BT07 : Toys & Games Take on new challenges It's here. Digimon BT7 Next

What exactly are those cards doing here

A three-mana creature attacking with first strike and haste means that its probably connecting if your opponent doesnt immediately have a removal spell, and when that happens, you get a Treasure for your trouble

81 Psychic IJN Turret Train Spe Riolu Dora1 1 "Imduk the World Chalice Dragon Knightmare Phoenix" 1 1 "Lyna the Light Charmer, Lustrous Knightmare Unicorn, 1 Apollousa, Bow of the Goddess" 1 1 "Borrelsword Dragon A mixed deck of Horus, which can be revived from the graveyard as many times as you want, and Eldritch, which can be deployed from the graveyard and traps

We would hesitate to call them free but it leaves their value somewhat ambiguous

I'm looking forward to seeing how you let these cards work together (their synergy)

Credit: Wizards of the Coast Buster Sword BPhillipYork: This is potentially something fairly dangerous and fits nicely into Boros