Lambo's Horns can absorb, store and release electricity. Child Lambo has yet to notice the power and can only release the lightning stored in his horns when his fear reaches its climax. Adult Lambo uses the lightning stored to perform techniques such as Elettrico Cornata.
At some point, 25 year old Lambo lost these horns and had to use replacements. But, during his fight with Leviathan, he found his horns and declared that he could finally fight at full power.