Sliver Queen, Brood Mother [Vanguard Series] San Diego Comic-Con 2017 if All Hallow's Eve is

if All Hallow's Eve is exiled with a scream counter on it

Set: Worldwake Type: Creature — Kor Artificer Rarity: Rare Cost: {1}{W} When Stoneforge Mystic enters the battlefield

{T}: Target 1/1 creature gets +1/+2 until end of turn

Set: Mercadian Masques Type: Instant Rarity: Rare Cost: {3}{U}{U} You may exile a blue card from your hand rather than pay this spell's mana cost

Sliver Queen, Brood Mother [Vanguard Series] San Diego Comic-Con 2017 if All Hallow's Eve isSet: Vanguard Series Type: Vanguard Rarity: Rare {3}: Create a 1 1 colorless Sliver creature token. Though long held captive beneath Volrath's stronghold, the sliver queen is actually freer than most of Rath's denizens. Her maternal instincts always take precedenceeven when they conflict with the evincar's agendaand through her numerous litters, she ranges across all of Rath.