Rifted Torment (Red)

You may play this from your banished zone.

When this is played from your banished zone, deal 1 arcane damage to target hero.

Blood Debt

Rulings

From the Monarch release notes

You may still play Rifted Torment from your hand. It would not deal the 1 arcane damage if it is played from your hand.
You may target yourself with the arcane damage.

Keyword notes

Blood Debt - Blood Debt is a new keyword existing on Shadow cards. Shadow cards can inflict a loss of life to access a greater power. At the end of your turn, you lose 1{h} for each blood debt card in your banished zone.

You only lose life at the end phase. Players do not have priority during the end phase.
If you have multiple cards with blood debt, you lose 1 for each instance of blood debt at the end of turn.
Only face-up cards banished with blood debt counts and will lose you . Face-down banished cards have no effects or stats.