The Steward of Nightmares

Ward—Exile the top two cards of your library
Cards you cast from exile cost {2} less to cast.
Instill Fear—At the beginning of your upkeep,
exile the top two cards of target player's library.
Until end of turn, you may cast face-up cards
that player owns in exile, and you may spend
mana as though it were mana of any color to cast
them.