Sword of the Ages [Legends] San Diego Comic-Con 2016 At the beginning of the

At the beginning of the upkeep of enchanted land's controller

Sacrifice another creature: Search your library for a card

Set: Darksteel Type: Artifact Rarity: Rare Cost: {9} Artifacts you control have indestructible

Numsgil did in Blog

Set: Unglued Type: Basic Land — Mountain Rarity: Common ({T}: Add {R}

Sword of the Ages [Legends] San Diego Comic-Con 2016 At the beginning of theSet: Legends Type: Artifact Rarity: Rare Cost: {6} Sword of the Ages enters the battlefield tapped. {T}, Sacrifice Sword of the Ages and any number of creatures you control: Sword of the Ages deals X damage to any target, where X is the total power of the creatures sacrificed this way, then exile Sword of the Ages and those creature cards.