They get to destroy the artifact or creature of their choice and any cards of yours that happen to match it, unless they have a reason to take a shot at your hand
You can do so with Merry-Maker, the field spell itself, or the themes search spell, Springans Watch, or you can be creative and disrupt the opponent with Book of Lunar Eclipse, netting a free summon in the process
After slapping on a few Energy of any typing, you can easily use Genome Hacking to copy your opponents Active Pokemon to attack with any of their attacks of your choice
I wish you luck and hope you have great fun
Grading Magic Cards Guide to Magic Card Grading This guide lays out how Three for One Trading grades Magic cards what each condition means, why EU/US terms sometimes clash, which tools their team uses, and how multiple checks keep mistakes rare
Equipment works this way, so, for example, to equip [c]Vorpal Sword[/c] to a creature, I dont have to tap either of them