Powder Keg [Magic Player Rewards 2004] Commander 2015 you may return that card

you may return that card to the battlefield under your control

Lightning Rider

Sacrifice Inventors' Fair: Search your library for an artifact card

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

infecting the land with his final curse

Powder Keg [Magic Player Rewards 2004] Commander 2015 you may return that cardSet: Magic Player Rewards 2004 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.