Munin the Runick Wings

Defender, flying
When Munin the Runick Wings enters the battlefield you may discard a card: search your
library and/or graveyard for a card named
Runick Fountain, reveal it, and put it into your
hand. If you search your library this way, shuffle.
Sacrifice Munin the Runick Wings: target
permanent gains hexproof until end of turn.