Scavenger Grounds
Land — Desert
: Add 
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, , Sacrifice a Desert: Exile all graveyards.
When the last scrap of flesh is scoured away, the Curse of Wandering ends. Then the dead may sleep.
Steven Belledin
Hour of Devastation (HOU)
• #182Rulings
The sacrificed Desert will be in your graveyard to be exiled by the last ability of Scavenger Grounds.
(wotc • 2017-07-14)
If a Desert has an ability with a cost of "Sacrifice a Desert," you can sacrifice that Desert to pay the cost for its own ability.
(wotc • 2017-07-14)
Desert is a land subtype with no special meaning. It doesn't grant the land an intrinsic mana ability. Other cards may care about which lands are Deserts.
(wotc • 2017-04-18)
Rulings
The sacrificed Desert will be in your graveyard to be exiled by the last ability of Scavenger Grounds.
(wotc • 2017-07-14)
If a Desert has an ability with a cost of "Sacrifice a Desert," you can sacrifice that Desert to pay the cost for its own ability.
(wotc • 2017-07-14)
Desert is a land subtype with no special meaning. It doesn't grant the land an intrinsic mana ability. Other cards may care about which lands are Deserts.
(wotc • 2017-04-18)