Shadowrealm Horror (Red)

As an additional cost to play this, banish 3 random cards in your graveyard.

If 1 or more cards with 6 or more

are banished this way, this gets +1

. 2 or more, this gets go again. 3 or more, you may play a card banished this way this turn.

Blood Debt

Rulings

From the Part the Mistveil release notes

Cards are first selected at random, then the player chooses the order that those cards are banished. E.g. If Diabolic Offering is selected at random, the player may choose to banish a 6 card first so that Diabolic Offering is banished with 6.

Keyword notes

Go again - Go again allows multiple actions to be played in a turn when usually playing an action with use up your action point, and therefore end your turn. A card with go again gives the controller of that card or activated ability 1 action point when it resolves.

When an action with go again resolves, its controller gains 1 action point.
Multiple instances of go again on the same card or activated ability do not stack. If a card or activated ability has multiple instances of go again when it resolves its controller gains 1 action point only.
If an action with go again does not resolve, its controller does not gain 1 action point.
You cannot reveal a card with no to Belittle. The card must have a value to its power that is 3 or less. (0 is a value)

All keywords

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.