DABL-JP007 Byssted Saronir
Dragon/Effect, DARK, Lv 6, ATK 2500, DEF 2000
You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) You can target 1 LIGHT or DARK monster in either GY; banish it, and if you do, Special Summon this card from your hand. This is a Quick Effect if your opponent controls a monster.
(2) If this card is sent to the GY: You can send 1 “Byssted” monster, except “Byssted Saronir”, or 1 “Branded” Spell/Trap from your Deck to the GY.

DABL-JP053 Fukurakuin / Rebranded
Continuous Spell
You can only use the 1st effect of this card’s name once per turn, also you can only use the 2nd effect of this card’s name once per Chain.
(1) If a LIGHT and/or DARK monster(s) is banished: You can target 1 of them; place it on the bottom of the Deck, and if you do, draw 1 card.
(2) Once per turn, when your opponent Normal or Special Summons a monster(s): You can target 1 “Byssted” monster in your GY; Special Summon it.

DABL-JP073 Rakuin no Kemono / Branded Beast
Continuous Trap
You can only use the 2nd effect of this card’s name once per turn.
(1) Once per turn, during the Main Phase, if you control a “Byssted” monster: You can Tribute 1 Dragon monster, then target 1 card your opponent controls; destroy it.
(2) During the End Phase: You can target 1 “Branded” Continuous Spell/Trap in your GY; place it face-up on your field.

Source.

Note: The monsters are called “深淵の獣” which translates to “beast(s) of The Abyss”, with “The Abyss” being the general name for this long story with Albaz vs. Aluber.

The name itself seems to be a combination of (A)byss + Beasted, near as we can tell.