Survivors' Encampment
Land — Desert
: Add 
.
, Tap an untapped creature you control: Add one mana of any color.
"What will happen to us?" they asked. The vizier paused. "I think . . . I think that's up to us now."
Jonas De Ro
Hour of Devastation (HOU)
• #184Rulings
To activate the last ability, you may tap any untapped creature you control, including one you haven’t controlled continuously since the beginning of your most recent turn. (Note that tapping the creature doesn’t use {T} [the tap symbol].)
(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
To activate the last ability, you may tap any untapped creature you control, including one you haven’t controlled continuously since the beginning of your most recent turn. (Note that tapping the creature doesn’t use {T} [the tap symbol].)
(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)