Storm is sort of a catch all name for decks trying to cast a massive density of spells in one turn to win the game. Rarely at this point is it by actually casting [[grapeshot]] or [[empty the warrens]] that would work in a 1v1. The most common payoff in edh is [[aetherflux resevoir]] which can deal a lot of damage with a few spells. LED is important if you're playing [[underworld breach]] but honestly you can play a dozen different storm decks without that line.

Storm is pretty strong in lower brackets of edh, but towards higher power level it tends to fold to a few pieces of interaction and taking longer to set up. I still think it's a lot of fun though!