jsut a note:
Shadowborn Apostle states: sacrifice and search for a demon creature card. if plural was intended the card would read, search your library for any number of demon creature cards. thats how wizard templates searching for multiple cards, at least now a days.
The OP's question stems from the fact that Demonic Hordes printed version says "Summon Demons" on the type line.
wouldn't it have to say:
"Search for your library for a Demon or Demons creature"
?????
(I am building a shadowborn themed EDH deck)
Two Score, Minus Two or: A Stargate Tail
(Image by totallynotabrony)
Two Score, Minus Two or: A Stargate Tail
(Image by totallynotabrony)