Change of Plans is a rare Instant card from New Capenna Commander (NCC), collector number 125. Current market price: $16.03, TCGplayer market prices via Scryfall.
Each of X target creatures you control connive. You may have any number of them phase out. (To have a creature connive, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature. Treat phased-out permanents and anything attached to them as though they don't exist until their controller's next turn.)