Shield Broker is a rare Creature — Octopus Advisor card from New Capenna Commander (NCC), collector number 29. Current market price: $0.23, TCGplayer market prices via Scryfall.
When this creature enters, put a shield counter on target noncommander creature you don't control. You gain control of that creature for as long as it has a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)