From Beyond [Battle for Zendikar Prerelease Promos] Duels of the Planeswalkers Promos 2012 The Wall of Bone is

The Wall of Bone is said to be an aspect of the Great Wall in Hel

Whenever enchanted land is tapped for mana

Set: Alliances Type: Enchantment Rarity: Rare Cost: {1}{B}{B} Cumulative upkeep—Pay 1 life

You may have that player shuffle

Set: Gateway 2007 Type: Instant Rarity: Rare Cost: {U}{U} Return target permanent to its owner's hand

From Beyond [Battle for Zendikar Prerelease Promos] Duels of the Planeswalkers Promos 2012 The Wall of Bone isSet: Battle for Zendikar Prerelease Promos Type: Enchantment Rarity: Rare Cost: {3}{G} Devoid (This card has no color.) At the beginning of your upkeep, create a 1 1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}." {1}{G}, Sacrifice From Beyond: Search your library for an Eldrazi card, reveal it, put it into your hand, then shuffle.