Deadwood Rumbler (Red)

Red Yellow Blue

When this attacks, draw a card then discard a random card. If a card with 6 or more

is discarded this way, banish a card from a graveyard.

Blood Debt

Rulings

From the Monarch release notes

You cannot defend with Deadwood Rumbler as it does not have a defense value.
Nobody has priority during the resolution of an ability. For example, you cannot play or activate an ability after drawing the card but before discarding. You also cannot see what card is discarded before responding to the banish of a card in a graveyard.
Banishing a card from a graveyard is mandatory. (You may banish the card you discarded)
You can banish a card from any player’s graveyard.

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.