Sigil of the Nayan Gods is a common Enchantment — Aura card from Alara Reborn (ARB), collector number 78. Current market price: $0.27 (foil $0.50), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +1/+1 for each creature you control. Cycling {G/W} ({G/W}, Discard this card: Draw a card.)