Gleaming Overseer [War of the Spark]

Set: War of the Spark Type: Creature — Zombie Wizard Rarity: Uncommon Cost: {1}{U}{B} When Gleaming Overseer enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.) Zombie tokens you control have hexproof and menace.