Cards legality in Standard

The following cards are not part of the legal card pool: Woodland Stream, Weaver of Currents, Bounty of the Luxa, Spring // Mind, Angler Drake, Pouncing Cheetah, Reason // Believe, Aerial Guide, Brambleweft Behemoth, Ambuscade, Feral Prowler, Aven Reedstalker, Nissa's Encouragement, Nissa, Genesis Mage, River Hoopoe, Avid Reclaimer