The Sound Of Drums is an Aura that goads a creature and makes it deal double damage, so even if that creature dies, The Sound Of Drums can be returned to the hand for just three mana

Aboshan, Cephalid Emperor Acquisition Octopus Backstreet Bruiser Bubble Smuggler Caelorna, Coral Tyrant Callous Oppressor Cephalid Aristocrat Cephalid Broker Cephalid Constable Cephalid Facetaker Cephalid Illusionist Cephalid Inkmage Cephalid Inkshrouder Cephalid Looter Cephalid Pathmage Cephalid Retainer Cephalid Sage Cephalid Scout Cephalid Snitch Cephalid Vandal Crafty Octopus Elder Deep-Fiend Giant Octopus Godhunter Octopus Kamiz, Obscura Oculus Keen Buccaneer Llawan, Cephalid Empress Lorthos, the Tidemaker Lorthos, the Tidemaker Marvo, Deep Operative Mesmerizing Benthid Obscura Interceptor Octavia, Living Thesis Octoprophet Omen Hawker Psychic Pickpocket Purple Pentapus Queza, Augur of Agonies Revel Ruiner Sea-Dasher Octopus Sealock Monster Shark Shredder, Killer Clone Sharktocrab Shield Broker Tidal Terror Ultros, Obnoxious Octopus Unruly Krasis
The card exudes pure power
Just like the Undead Unleashed deck, you can blow your budget on upgrading this deck pretty easily
With an Ashnods Altar in play, we should be able to start hatching out creatures like Ulamog, the Ceaseless Hunger or a Cataclysmic Gearhulk to really mess with the table
But that's what upgrades are for, right