Clockwork Avian [Antiquities]Set: 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 only during your upkeep.

put a +1/+1 counter on Arcbound Crusher

Set: Black & White: Dark Explorers Type: Colorless Rarity: Promo Retreat cost: Colorless

{T}: Target creature deals damage to itself equal to its power

Set: EX: Emerald Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

Thief of Blood enters the battlefield with a +1/+1 counter on it for each counter removed this way

Water Rarity: Ultra Rare Retreat cost: 1

Set: Sword & Shield: Black Star Promos Type: Psychic Rarity: Promo Retreat cost: Colorless

Set: World Championships 2006 Type: Colorless Rarity: Rare

Set: Welcome Deck 2017 Type: Creature — Nightmare Horse Rarity: Rare Cost: {5}{B} Flying (This creature can't be blocked except by creatures with flying or reach

Set: EX: Crystal Guardians Type: Grass Rarity: Holo Rare Retreat cost: Colorless

Set: League & Championship Cards Type: Colorless Rarity: Common Retreat cost: Colorless

Set: EX: FireRed & LeafGreen Type: Water Rarity: Secret Rare Retreat cost: Colorless