
Basic lands each player controls have shroud as long as that player controls three or fewer lands. (They can't be the targets of spells or abilities.)
Sheltering Prayers has 1 printing, first in Prophecy (2000). EDHREC ranks it #32,490 among Commander cards. It appears most in Pang Tong, "Young Phoenix" decks (1 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.