Blood Rose

Blood Rose can only be played on your first turn. If
it is played on any turn after your first, you lose the game.

Blood Rose comes into play with 5 Oath counters on
it. You may sacrifice any amount of creatures on any turn to put an Oath counter on Blood Rose. When Blood Rose has 25 Oath counters, exile it, and search your library for a card named "Blood Rose Covenant" and put it into the battlefield tapped,
then shuffle your library.