Bystial Magnamhut

Per-phrase breakdown

• You can target 1 LIGHT or DARK monster in either GY; banish it, and if you do, Special Summon this card from your hand. (Ignition)
• This is a Quick Effect if your opponent controls a monster. (Trigger)
• If this card is Special Summoned: You can activate this effect; during the End Phase of this turn, add 1 Dragon monster from your Deck or GY to your hand, except "Bystial Magnamhut". (Condition)
• You can only use each effect of "Bystial Magnamhut" once per turn. (Condition)

Judge-facing facts

• Normal Summon / Set from hand uses 1 tribute (Level 6).
• The effect to banish and Special Summon is an Ignition Effect (or a Quick Effect if the opponent controls a monster) that activates in the hand.
• The effect to banish and Special Summon cannot be activated during the Damage Step.
• Banishing the targeted monster and Special Summoning this card occur simultaneously.
• The effect to add a Dragon monster is a Trigger Effect.
• The Trigger Effect can be activated during the Damage Step.
• Adding the monster during the End Phase does not start a Chain Link.

Card-specific notes from database

• You can activate the Trigger Effect even if there are no Dragon monsters in your Deck or GY. (Konami neuron)
• "Ash Blossom & Joyous Spring" and "Ghost Belle & Haunted Mansion" can be chained to the Trigger Effect, as it includes adding a card from the Deck and GY to the hand. (YGOResources)
• If an effect preventing adding cards from the Deck to the hand (e.g., "Mistake") is applying during the End Phase, you cannot add a Dragon monster from the Deck, but you must add one from the GY if possible. (YGOResources)
• If "Prohibition" is applied declaring this card's name after the Trigger Effect resolves, the End Phase addition is still performed. (YGOResources)