Hood of Red Sand

Kassai Specialization

Attack Reaction -

, banish a red and a yellow card from your graveyard, destroy this: Target sword attack gets "When this hits, draw a card."

Battleworn

Rulings

From the Heavy Hitters release notes

In addition to paying a resource and destroying Hood of the Red Sand, the cost to activate Hood of the Red Sand is also banishing a total of two cards from your graveyard: one red card and one yellow card. You cannot activate Hood of the Red Sand if you cannot pay these costs.
You choose the cards to banish from your graveyard at the time you activate the ability. There is no priority between choosing the cards to banish and banishing them (i.e. you cannot play cards or activate abilities if you don’t have priority)
You can only activate Hood of the Red Sand if there is a sword attack to target.
Only the targeted sword attack is affected (currently on the combat chain), not all attacks by the sword.

Keyword notes

Battleworn - Equipment that wear down after each time they are used to defend. If you defend with a card with Battleworn, put a -1{d} counter on it when the combat chain closes.

When you defend with a card it remains on the combat chain until the chain closes, therefore you cannot defend with an equipment multiple times on the same combat chain.
A -1 counter stays on the card until the card is destroyed or the game ends.
If the defense of a card that is defending is below zero, its defense value is considered to be zero.
When this card is destroyed, it is sent to your graveyard. (Not when it has 0)
When this card is destroyed, it is sent to your graveyard.
If the defense of a card that is defending is below zero, calculate as if its defense is zero.