Would E- Hero Wildheart die if someone plays Deck Devastation Virus and I draw it.

If hes in your hand yes, if hes on the field no.

E. Hero Wildman/"heart" is a Continuous Effect and Continuous Effects are ONLY active while they are face-up on the field.

Since he would be in your hand when he is drawn, he WILL be destroyed by the effect of Deck Devastation Virus.

If he is on the field when Virus is first activated, he will NOT be destroyed (unless he is face-down since face-down monsters are NOT active)