Tunnel [Beta Edition] Apocalypse Set: Worldwake Type: Artifact Rarity:

Set: Worldwake Type: Artifact Rarity: Rare Cost: {1} Whenever a permanent enters the battlefield tapped and under your control

Set: Rise of the Eldrazi Type: Land Rarity: Rare {T}: Add {C}

Set: Betrayers of Kamigawa Type: Legendary Creature — Spirit Rarity: Rare Cost: {6}{G}{G} Snake offering (You may cast this card any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake

They don't untap during their controllers' untap steps for as long as Kill Switch remains tapped

Tunnel [Beta Edition] Apocalypse Set: Worldwake Type: Artifact Rarity:Set: Beta Edition Type: Instant Rarity: Uncommon Cost: {R} Destroy target Wall. It can't be regenerated.