Just remember that for purposes of the game, your new teammate becomes the owner of those cards
With Expressive Iteration being in so many decks and reaching all 4 copies even in a format like Vintage, I hear a lot of players saying the card is too good in both Modern and Legacy, comparing it essentially to Treasure Cruise and Dig Through Time, which both formats have seen and banned
You just play some good creatures and good planeswalkers while killing everything your opponent plays
So basically, Chains punishes players who try to draw lots of cards by keeping cards constantly flowing in and out of players hands, or into the graveyard
It brings you into the fantasy world of Argaia, where you'll use strategy to fight enemies, call upon allies, and create cooperative magic spells