Clockwork Avian [Antiquities] Xyz/Effect monster if Nether Shadow is in

if Nether Shadow is in your graveyard with three or more creature cards above it

Reverse Type: Legendary Enchantment Whenever an opponent casts their first spell each turn

target player can't cast instant or sorcery spells

Set: Black & White: Dark Explorers Type: Fire Rarity: Holo Rare Retreat cost: Colorless

choose 1 Spell Card from your Deck

Clockwork Avian [Antiquities] Xyz/Effect monster if Nether Shadow is inSet: Antiquities Type: Artifact Creature Bird Rarity: Rare Cost: {5} Flying Clockwork Avian enters the battlefield with four +1 +0 counters on it. At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1 +0 counter from it. {X}, {T}: Put up to X +1 +0 counters on Clockwork Avian. This ability can't cause the total number of +1 +0 counters on Clockwork Avian to be greater than four. Activate this ability only during your upkeep.