Hellgrave Squirmer
Level 1 DARK
Fiend / Effect
You can only use each of the [1] [2] effects of this card once per turn.
[1] If you control a Fiend monster (Quick Effect): You can Special Summon this card from your hand, then you can destroy 1 "Yubel" or 1 monster that mentions it that you control.
[2] You can banish this card from your GY; Special Summon 1 Fiend monster with 0 ATK / DEF from your hand or GY, except "Hellgrave Squirmer".
Nightmare Throne
Field Spell
You can only activate this card once per turn.
[1] When this card's activation resolves: You can take 1 Fiend monster with 0 ATK / DEF from your Deck, and either add it to your hand or destroy it.
[2] Once per turn, if a face-up "Yubel" monster(s) you control leaves the field by card effect: You can add 1 "Yubel" monster from your Deck, GY or amongst your banished cards to your hand, whose Level is 1 higher or 1 lower than 1 of the monsters that left the field, then you can Special Summon the added card, ignoring its Summoning Conditions.