You can quickly special summon multiple elemental heroes at a time. Cards like HERO's Bond lets you swarm the field, while A Hero Emerges can be used to special summon strong higher leveled ones. Since most players often only set 2 spell/trap cards, a simple normal summon with a fusion summon is enough to clear their entire back row. This can lead to an easy OTK if you also have a De-Fusion in your hand.
Destroys Spell Cards / Destroys Trap Cards
Summon Blazeman, activate 1st effect - get Poly from deck and fuse whatever 2 E-herous you got in hand, activate 2nd effect - send Neos to GY to increase Blazeman attack's to 2500, activate R-Righteous justice to clear backrow, gg