Dragonic Knight

Edison Card Text
When the effect of an opponent's monster is activated that targets and destroys a card(s) you control, you can send the targeted card(s) to the GY to Special Summon this card from your hand.
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●Dragonic Knight's Quick Effect is chained to the effect of your opponent's Monster Card that would destroy your card●Dragonic Knight's effect can only be activated if the effect of your opponent Monster Card targets card(s) you control. When your opponent activates the effect of Sacred Phoenix of Nephthys to destroy every Spell and Trap Card on the field, you can't chain Dragonic Knight's effect, because the effect of Sacred Phoenix of Nephthys does not target your Spell or Trap Cards on the field.
●If the effect of your opponent's Monster Card targets a card you control and a card your opponent controls, you can chain Dragonic Knight's effect by sending only your targeted card to the GY.
●Dragonic Knight's effect must be immediately chained to the effect of your opponent's Monster Card that targets card(s) you control. You can't activate the effect of another card and then chain Dragonic Knight's effect.
edisonformat.com
"Dragonic Knight's" Quick Effect is chained to the effect of your opponent's Monster Card that would destroy your card(s). The card(s) targeted by the effect of your opponent's Monster Card are sent to the Graveyard as a cost.
"Dragonic Knight's" effect can only be activated if the effect of your opponent Monster Card targets card(s) you control. When your opponent activates the effect of "Sacred Phoenix of Nephthys" to destroy every Spell and Trap Card on the field, you cannot chain "Dragonic Knight's" effect, because the effect of "Sacred Phoenix of Nephthys" does not target your Spell or Trap Cards on the field.
If the effect of your opponent's Monster Card targets a card you control and a card your opponent controls, you can chain "Dragonic Knight's" effect by sending only your targeted card to the Graveyard.
"Dragonic Knight's" effect must be immediately chained to the effect of your opponent's Monster Card that targets card(s) you control. You cannot activate the effect of another card and then chain "Dragonic Knight's" effect.