Soulcipher Board enters with three omen counters on it. {1}{U}, {T}: Look at the top two cards of your library. Put one of them into your graveyard. Whenever a creature card is put into your graveyard from anywhere, remove an omen counter from Soulcipher Board. Then if it has no omen counters on it, transform it.

Flying Cipherbound Spirit can block only creatures with flying. {3}{U}: Draw two cards, then discard a card.