+Birds (6)
Flying
: Add one mana of any color.
Whenever Matsu-Tribe Birdstalker deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.
: Matsu-Tribe Birdstalker gains reach until end of turn. (It can block creatures with flying.)
Reach (This creature can block creatures with flying.)
When Seller of Songbirds enters, create a 1/1 white Bird creature token with flying.
Enchant creature
Whenever enchanted creature attacks, reveal cards from the top of your library until you reveal an Aura card. You may put that card onto the battlefield. If you don't, put it into your hand. Put the rest on the bottom of your library in a random order.
When an opponent casts a spell, if Veil of Birds is an enchantment, Veil of Birds becomes a 1/1 Bird creature with flying.
Gatherer works better in the Companion app!
: Matsu-Tribe Birdstalker gains reach until end of turn. (It can block creatures with flying.)