<<12817>> is Special Summoned by the effect of <<5752>>. In this case, can the effect of <<12817>> that adds a <<4041>> from my Deck to my hand be activated?
Answer: Even if <<12817>> is Special Summoned with the effect of <<5752>>, its effect that adds a <<4041>> from your Deck to your hand can be activated. (Even if you activated <<5752>> as Chain Link 2 or higher and Special Summoned <<12817>>, its effect can be activated after that Chain resolves.)
Cards related to this ruling
Spell
QuickIf you control a Spellcaster monster: Target 1 monster you control; Tribute that target, then Special Summon 1 Spellcaster monster from your hand, then you can destroy 1 monster on the field.
DARK
6ATK:
2000
DEF:
1700
You can Special Summon this card (from your hand) by discarding 1 card. If this card is Normal or Special Summoned: You can add 1 "Dark Magician" from your Deck to your hand. During damage calculation, if your other DARK Spellcaster monster battles an opponent's monster (Quick Effect): You can send this card from your hand or face-up field to the GY; that monster you control gains 2000 ATK/DEF during that damage calculation only.
DARK
7ATK:
2500
DEF:
2100
''The ultimate wizard in terms of attack and defense.''