Dolmen Gate [Lorwyn] Zombie Mongoose you may search your library

you may search your library for an Assembly-Worker creature card

you may have Noggle Hedge-Mage deal 2 damage to target player or planeswalker

"The slivers became adept at provoking a fear response in other species

You may play land cards and cast spells from among cards exiled this way without paying their mana costs

Supporting this hteory

Dolmen Gate [Lorwyn] Zombie Mongoose you may search your librarySet: Lorwyn Type: Artifact Rarity: Rare Cost: {2} Prevent all combat damage that would be dealt to attacking creatures you control. Lorwyn's stones resonate with the place from which they were hewed. Though taken far, still they call to their home when silence is upon the land.