Diabolic Offering (Blue)

If a card with 6 or more

has been put into your banished zone this turn, this card's

and

are 6, otherwise they are 0.

Blood Debt

Rulings

From the Dusk till Dawn release notes

This ability is functional at all times, regardless of the visibility or zone.
If you attack/defend with this, and then banish a card with 6 or more power, then its power and defense will still be set to 6.

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.