Nightshade Assassin [Commander 2019] Creature Human Assassin Argivian Avenger gets -1/-1 and

Argivian Avenger gets -1/-1 and gains your choice of flying

The designers continue until these are all filled in:

Set: Mystery Booster Type: Artifact Creature — Fox Rarity: Uncommon Cost: {3} When Filigree Familiar enters the battlefield

Vantress Paladin enters the battlefield with a +1/+1 counter on it

Nightshade Assassin [Commander 2019] Creature Human Assassin Argivian Avenger gets -1/-1 andSet: Commander 2019 Type: Creature Human Assassin Rarity: Uncommon Cost: {2}{B}{B} First strike When Nightshade Assassin enters the battlefield, you may reveal X black cards in your hand. If you do, target creature gets X X until end of turn. Madness {1}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)