Do damage from the beyond the grave by equipping the following tombstones, complete with upgrades:
Zombified Tombstone (1,000 Coins): Reanimate zombies beneath the ground to drag your foes under.
Flaming Tombstone (4,000 Coins): This tombstone is red hot. One touch sets enemies on fire.
Portal Puncher Tombstone (2,000 Coins): Create an instant trapdoor to the underworld.
Midas Mausoleum (20,000 Coins): Turns monsters into coins.