Goat format ruling
Skull Knight #2

Card effect (current official text)If you Tribute Summon a Fiend-Type monster by Tributing this monster, Special Summon 1 "Skull Knight #2" from your Deck. Then shuffle your Deck.
Rulings
- If you Tribute Set a high level Fiend monster by Tributing this card, you CAN Special Summon another Skull Knight #2 from your Deck and you do NOT have to reveal your Set monster to prove it is a Fiend.
- If you activate Change of Heart to control your opponent’s Skull Knight #2 and Tribute it to Tribute Summon a Fiend monster you can Special Summon a Skull Knight #2 from your Deck. But if you activate Soul Exchange to Tribute a Skull Knight #2 on your opponent’s side of the field, neither player can activate its effect.
- If this card is used as a Tribute for a Special Summon, such as a Ritual Summon, the effect of this card is not activated.
- If the Tribute Summon of a Fiend monster is negated by Solemn Judgment or Horn of Heaven, the effect of Skull Knight #2 will not activate.
- If the opponent chains Torrential Tribute to the effect of Skull Knight #2, all monsters will be destroyed (including the Lv 5 or higher Fiend monster that was Tribute Summoned) and then Skull Knight #2 will be Special Summoned from your Deck. If the opponent waits until the effect of Skull Knight #2 resolves and another copy is Special Summoned, and then activates Torrential Tribute in response to that Summon, all the monsters will be destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.