Lyna, Veil of Vengeance is a rare Legendary Creature — Soltari Cleric card from Mystery Booster: Commander Edition (MBC), collector number 43.
Shadow (This creature can block or be blocked by only creatures with shadow.) Whenever a creature you control with shadow deals combat damage to a player, draw a card. {3}: Put a shadow counter on another target creature. Activate only as a sorcery.