Powder Keg [Urza's Destiny]

Powder Keg [Urza's Destiny]Set: Urza's Destiny Type: Artifact Rarity: Rare Cost: {2} At the beginning of your upkeep, you may put a fuse counter on Powder Keg. {T}, Sacrifice Powder Keg: Destroy each artifact and creature with mana value equal to the number of fuse counters on Powder Keg.

Set: Sun & Moon: Unbroken Bonds Type: Grass Rarity: Secret Rare Retreat cost: Colorless

Set: Fifth Dawn Type: Artifact Rarity: Rare Cost: {3} You may play lands from your graveyard

Set: Neo Destiny 1st Edition Type: Fire Rarity: Rare Retreat cost: Colorless

put an age counter on this permanent

Set: Antiquities Type: Enchantment Rarity: Uncommon Cost: {B}{B} Sacrifice a creature: Destroy target artifact

Set: Betrayers of Kamigawa Type: Legendary Artifact — Equipment Rarity: Rare Cost: {2} Whenever equipped creature deals combat damage

If both targets are still legal as this ability resolves

Set: EX: Team Rocket Returns Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Black & White: Boundaries Crossed Type: Grass Rarity: Holo Rare Retreat cost: 1

Set: HeartGold & SoulSilver: Call of Legends Type: Water Rarity: Holo Rare Retreat cost: Colorless

dragons you control have go again while attacking

was a Taoist master and tutored his soldiers in those arts