The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking, the controller of the planeswalker it was attacking, or the protector of the battle it was attacking at the time the ability resolves
as Chishiro gathered information on the Mukotai threat, he had learned this name but little else
Once Ive gained a bit more confidence, and maybe some more cards, I could even start easily making decks that are currently winning professional players matches thanks to the apps Deck List Copy feature - which enables players to create decks that theyve put onto their clipboard from somewhere else
VEXING BAUBLE To be fair, this card is a meta call
Examples include certs 71294671, 71294672, 71294673 (yes all 3 of these were sold by the same eBay seller and when I reached out to comment they said they were the original owner and got them at Nintendo World in 2005), and 89689485 (4 certs, or 25% of public certs)
It evokes a sense of impossibility