(https://i.imgur.com/LXBgpHx.png)
If this card is Normal Summoned: You can target 1 "Untergang" Quick-Play Spell in your GY; set it to your side of the field. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can draw 1 card. You can only use each effect of "Untergang Tactician, Altair" once per turn.
(https://i.imgur.com/CiJmboY.png)
If this card is Normal Summoned while you have a "Untergang" Quick-Play Spell in your GY: You can add 1 "Untergang" Quick-Play Spell from your Deck to your hand. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can target 1 card your opponent controls, return it to the hand. You can only use each effect of "Untergang Assassin,Fower" once per turn.
(https://i.imgur.com/D5CllJo.png)
If this card is Normal Summoned: You can send 1 "Untergang" Quick-Play Spell from your Deck to the GY. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can Special Summon 1 "Untergang" monster from your hand. You can only use each effect of "Untergang Soldier, Lancelot" once per turn.
(https://i.imgur.com/4sxTW8n.png)
You can discard 1 card; set 1 "Untergang" Quick-Play Spell directly from your Deck to your side of the field. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can target 1 monster your opponent controls; half it's ATK and DEF. You can banish this card from your GY, except the turn it was sent there; send 1 "Untergang" card from your Deck to the GY, except "Untergang Warlock, Altair". You can only use each effect of "Untergang Warlock,Altair" once per turn.
(https://i.imgur.com/ckur5Li.png)
You can Special Summon this card (from your hand) by sending 1 "Untergang" Quick-Play Spell from your Deck to the GY. You can only Special Summon "Enigmatic Untergang Assassin, Fower" once per turn this way. You can shuffle 3 "Untergang" Quick-Play Spells with different names from your GY into your Deck; draw 1 card. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can target 1 card in your opponent's GY; banish it. You can only use each effect of "Enigmatic Untergang Assassin, Fower" once per turn.
(https://i.imgur.com/x3poK7F.png)
You can discard 1 Spell; Special Summon 1 "Untergang" monster from your Deck. During your End Phase, if you did not activate a Spell this turn: You can set 1 "Untergang" Quick-Play Spell from your GY to your side of the field. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: All "Untergang" monsters you control gain 500 ATK and DEF. You can only use each effect of "Untergang Knight, Lancelot" once per turn.
(https://i.imgur.com/MgyhCEN.png)
If you have at least 3 "Untergang" Quick-Play Spells in your GY: You can tribute this card you control; Special Summon 1 "Untergang Miracle Creator, Rom" from your extra deck or GY. During your opponent's turn, if you activate a "Untergang" Quick-Play Spell: You can return this card you control to the hand; Special Summon 1 "Untergang" monster from your GY in Defense Position. You can only use each effect of "Untergang Prince, Rom" once per turn.