Duke Ulder Ravengard is a rare Legendary Creature — Human Noble Soldier card from Battle for Baldur's Gate Promos (PCLB), collector number 272s. Current market price: — (foil $0.82), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, another target creature you control gains haste and myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)