In a "D/D" Deck, a simple OTK can be initiated if there is this card, "D/D Swirl Slime", and "D/D/D Oblivion King Abyss Ragnarok" in your hand. Use the effect of "Swirl Slime" to send itself and this card to your Graveyard to Fusion Summon "D/D/D Oracle King d'Arc". Next, use the other effect of "Swirl Slime" to banish itself from the Graveyard and Special Summon "Abyss Ragnarok" from your hand. Use the effect of "Abyss Ragnarok" to Special Summon this card from your Graveyard. With this card having 3000 ATK, "Abyss Ragnarok" having 2200 ATK, and "d'Arc" having 2800 ATK, they have a combined damage output of 8000.
If any of the 3 monsters are missing, but there is a "D/D Savant Kepler" in your hand, "Kepler" can be Normal Summoned to search for "Dark Contract with the Gate". And then use "Gate" to get the missing monster for this combo. Doing so would also give yourself a Tribute for the effect of "Abyss Ragnarok" to be able to get rid of a monster blocking the way of the OTK.