Treetop Bracers is a common Enchantment — Aura card from Nemesis (NEM), collector number 123. Current market price: $0.11 (foil $0.93), TCGplayer market prices via Scryfall.
Enchant creature (Target a creature as you cast this. This card enters attached to that creature.) Enchanted creature gets +1/+1 and can't be blocked except by creatures with flying.