Siegfried, Famed Swordsman Menace and a touch of self mill arent enough to help Siegfried escape the mediocrity that similar cards generally end up in, but do make it better than many of your other get big based on the size of your graveyard cards
However, oftentimes people will conflate the reality of their confirmation bias with a fallacy suggesting the inverse
For more support, combine the Ho-Oh EX | Lugia EX set with Zeraora (its ability generates Lightning Energy at the end of the first turn) and the new Elemental Switch Item card to move a Fire, Water, or Lightning (in this case, its Lightning from Zeraora), towards Ho-Oh EX
If your opponent isnt careful, theyll explode on their own turn before they even see it coming
A sharp listing title and an honest condition description also go a long way
Theres just so much you can do with this card, and it really exemplifies what makes adventure cards so good