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.

By appearing in places miles apart at the same time

After the Foundry Street riot

Pyromaster deals 1 damage to target player or planeswalker and 1 damage to up to one target creature that player or that planeswalker's controller controls

Set: Darksteel Type: Artifact Rarity: Rare Cost: {5} Indestructible (Effects that say "destroy" don't destroy this artifact

During a hunt they often call to each other

annihilator 6

that player adds one mana of any type that land produced

Each creature in a pile that can block the creature that pile is assigned to does so

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {0} {T}: Add {B}

Set: Anthologies Type: Basic Land — Forest Rarity: Common ({T}: Add {G}

Set: Beta Edition Type: Enchantment Rarity: Uncommon Cost: {2}{W}{W} At the beginning of your upkeep

Left unchecked