You can take profit of these self-destroying effects by chaining "Scrapstorm" and/or "Scrap Sheen" to their activations, as well as by using "Scrap Factory" to Special Summon almost any "Scrap" monster from the Deck, when another one is destroyed by a card effect and sent to the Graveyard, either by their own effects, or by a general one, such as "Raigeki", "Sylvan Marshalleaf", "Artifact Moralltach" etc
Then once every battle, if it battles a special summoned monster, it can gain ATK equal to the opposing monsters ATK, meaning it will pretty much always win every battle its in
Aven Mindcensor, Varragoth, Bloodsky Sire, Always Watching, Abstruse Appropriation
The weakness of Griselbrand is that if you are too far behind when you make him you have to wait for him to deal damage before you can risk drawing cards and in this situation you are going to get wreaked by the right removal