First, new article today with more information about the new succubus! She could be called Jumping Succubus or Bouncing Succubus or Bouncy Succubus, I guess the last option would be the cleanest. At any rate, I had to translate her effects to talk about her with some friends, so might as well include all that here. Seems I'm a bit late in that regard and that info was available last month to paid supporters, but I didn't know that before writing this.
『Bouncy Succubus』
A mysterious, carefree succubus that flits about through empty roads at night. She appears unreserved, and doesn't actively hunt for semen. However, those that stare at her bouncing ass will inevitably be drawn in and dye her butt white with their seed.
『Bouncy Succubus』 Squeezer, Succubus, Seal 6
・Buttjob Butt element Squeeze (2) Imagination (1) Seal reduction (1)
If unsealed, defenders you play this turn have atk/life +1. This effect does not stack with itself.
・Reverse cowgirl Vaginal element Squeeze (2) Seal reduction (2)
If unsealed, squeeze for 4 damage and place a 『Butt Slave Crest』 on the opponent's side of the field.
・Clothed paizuri Breast element Requires Big Breasts
Squeeze (2) Select one defender on your side of the field that has already moved, and make them able to act again.
・Double buttjob Butt element Combination skill (counts as an action for a Succubus of Black Iron and Selfishness as well) Squeeze (4)
You may select one defender from your hand. If you do, play this defender on your side of the field, then discard it. If one or both squeezers are unsealed, don't discard the defender, and instead give it Haste and 1 Durability for each unsealed squeezer. Afterwards, seal reduction (2) for both squeezers.
・Unsealed ability Constant ability
Whenever a defender without Haze enters on your side of the field, draw a card.
『Butt Slave Crest』 Placed Card Curse, Haze
・When you are targeted by a butt element skill, that skill hits you one more time. ・You cannot block butt element skills with defenders.
Haze referring to the effect where the card never enters your graveyard, haven't bothered with the translation so I don't know what you guys refer to it as. 陽炎 in the base Japanese.
Other gameplay changes, forced squeeze actions now have an effect on succubi's seal progress, so succubi with lust crests will eventually unseal and start dealing increased damage. Beyond that, this feels like a big buff to Succubus of Black Iron and Selfishness, who gets free progress on her seal the turn after being beaten back as a defender now. Various curse cards related to succubi more than anything curse-related are now considered succubus spells; all abilities that affect curses will now affect both to prevent gameplay impacts from this. Both of these changes have far more to do with flavor than anything else, so I'm guessing the Black Iron buff was unintentional.
With onomatopoeia, the big thing is that most onomatopoeia describes the sound of the action. I don't know of any good way to translate sexual onomatopoeia, though more general onomatopoeia I can do well. Onomatopoeia just being transliterated by mtl is one of the things that pushed me to learn Japanese in the first place, as that was awful.
Edit: Wait, by "Faithless" do you mean Succubus of Trust and Mania? 信用 makes no implication about religious faith.