Edison format ruling
Dark Ruler Ha Des

Card effect (current official text)Cannot be Special Summoned from the GY. Negate the effects of monsters destroyed by battle with Fiend monsters you control.
Rulings
(C) This card cannot be Special Summoned from the GY. (1) Negate the effects of Effect Monsters destroyed by battle with Fiend-Type monsters you control.
- The (C) Condition cannot be negated.
- Dark Ruler Ha Des cannot be Special Summoned face-down by The Shallow Grave.
- The (1) Continuous Effect does not activate. It also applies to Ha Des.
- This effect CANNOT be negated by Divine Wrath, but CAN be negated by Skill Drain.
- This effect does not apply if Zombie World changes to your Fiend-Types into Zombie-Types.
- Monster destroyed by battle are marked for destruction at the end of Damage Calculation.
- Effects that activate in Substep 5 - After Damage Calculation are negated.
- Effects that activate in Substep 6 - Resolve Effects are negated (ex: Ryko, Lightsworn Hunter and D.D. Warrior Lady).
- Effects that activate in Substep 7 - End of the Damage Step are negated (ex: Mystic Tomato).
- Effects that activate in the GY are negated; such as Treeborn Frog, Plaguespreader Zombie, Sinister Serpent. The negation is reset if these cards are removed from the GY.
- This effect does not affect monsters destroyed as substitutes such as Six Samurai monsters, or if Relinquished would be destroyed by battle while equipped with Sangan.
- If your Dark Ruler Ha Des or other Fiend-Type monster destroys Tyrant Dragon as a result of battle, a Dragon-Type monster must still be Tributed when Tyrant Dragon is Special Summoned from the GY. This is because Tributing a Dragon-Type monster is a condition on the Summoning of the card; it is not part of the effect. For the same reason, if a Spirit Monster is destroyed by a Fiend-Type monster when Dark Ruler Ha Des is on the field, it still cannot be Special Summoned from the GY. Also if two Dark Ruler Ha Des destroy each other in battle, neither can be Special Summoned from the GY.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.