ebay journey together booster box Enhanced Case - SV09: Journey Together and more Trainers Pokémon Pokemon TCG SV09 Journey Together

So we need enchantments that do interesting things when you sacrifice them, like Aura of Silence

Graded Pokemon Cards Graded Pokemon Cards help give collectors a guarantee of the condition of a Pokemon Card

Exchange X SPELL Both players reveal their hands and add 1 card from each other's hand to their hand

EFFECT Choose 1 face-up Level 4 LIGHT Machine monster with an original DEF of 800 on your field and have this card gain ATK equal to the [Original ATK of the chosen monster] until the end of the opponents next turn

While it might not be a format-defining card in Constructed, I wouldn't be surprised to see this show up in Standard decks