Over My Dead Bodies

Other combat-relevant abilities such as flying work on attacking or blocking creature cards in graveyards. An attacking creature card with flying in a graveyard could be blocked only by creature cards with flying or reach in graveyards.

During combat, creature cards in graveyards can attack and block just as if they were on the battlefield. Attacking creature cards in the graveyard can be blocked only by creature cards in the defending player’s graveyard.

If Over My Dead Bodies leaves the battlefield in the middle of combat, graveyard creatures go back to being just dead. They’re removed from combat.

You can target attacking or blocking creature cards in graveyards with spells like Giant Growth.

Creature cards in graveyards attacking or blocking will cause abilities that trigger whenever a creature attacks or blocks to trigger.