Activate this card to Special Summon a "Totem Dragon" from your Graveyard. Then, Tribute Summon "Red-Eyes Darkness Metal Dragon" by revealing and using Totem Dragon as the required 2 Tributes. Then, use REDMD's effect to Special Summon a Dragon from your Graveyard. In this scenario, The Shallow Grave effectively allowed you to Special Summon two Dragons to your side of the field, one of which has 2800 ATK. This strategy works better mid- to late-game. It circumvents the fact that normally you would have to wait one turn to actually use the monster summoned by The Shallow Grave while also potentially getting rid of the monster that your opponent summoned.
This card also works well with cards like "Marshmallon", which will often cause your opponent to waste some monster destruction to begin with. Seeing monsters like "Marshmallon" a second time around can be daunting.
After you activate this card, activate "Nobleman of Crossout" to take care of whatever monster your opponent sets.