A clever, but difficult trick is to chain "A Deal with Dark Ruler" to the negating effect of "Stardust Dragon" or "Stardust Dragon/Assault Mode". Not only is a card negated, a 3500 attacker can be placed on the field as well.
Alternatively, the effect of your own "Stardust Dragon" can be used and activate 1 " A Deal With Dark Ruler" to Special Summon this card from your hand.
Tribute a Level 8 monster and another one to Normal Summon "The Creator", then activate "A Deal with Dark Ruler" to Special Summon "Berserk Dragon". Activate the effect of "The Creator" to get the Level 8 monster back for a possible OTK.
If this card has become too weak, Tribute it for "Advance Draw".
Use "Ojama Trio" to put 3 Tokens on your opponent's field, after this use "Zero Gravity" to change them to Attack Position, so use this card to attack all Tokens and make an OTK.
An OTK is possible if this is done the turn this card is Summoned and your opponent controls at least 3 monsters.
This card can be kept at 3500 ATK consistently if "Alector, Sovereign of Birds" can be kept on the field, and use its power to negate this card's effect during your Main Phase 2, so its unable to trigger during the End Phase. Then it will still have full power at the start of each of your turns.