The goblin idea of music is to hit something with a stick.

Goblin War Drums

Creatures you control have menace. (They can't be blocked except by two or more creatures.)

Their eardrums may have given out, but the rest of them never will.

Masters 25

Seventh Edition

Each creature you control can't be blocked except by two or more creatures.

"Goblins charge with a deafening war cry. The cry doesn't mean anything—it just drowns out the drums!"
—Reod Dai, mercenary

Fifth Edition

Each creature you control cannot be blocked by only one creature.

When creating a new War Drum, Goblin designers sought out the highest quality skulls. Serra Angel skulls were most highly prized, although most acknowledged that the skull of the exotic Sea Serpent made for a richer tone.

Fallen Empires

Each attacking creature you control that opponent chooses to block may not be blocked with fewer than two creatures.

Multiple War Drums are not cumulative. They are redundant.

When combined with an effect that reads "Each creature you control can't be blocked by more than one creature," none of your creatures can be blocked.