I thought the boa would use the exact same mechanic which dune scorpion currently uses. Since the mechanic isn´t overpowerd in any way, just a little annoying (and, as you said, the ability doesn´t fit the name "neurotoxin" that well).
But for a Boa constructor, that effect would make perfect sence. But you want to make it gain more attack with each card played, which doesn´t make any sence.
COME ON!!! If you want this game to make more sence, you should try that!!! And if you want to make this effect more balanced in any way, you should TRY SO! But don´t use one reason as a COVER to try the other thing!!!
Since you want that badly, that the effect, as it currently exists, is removed from the game, you must think either that the mechanic is overpowerd, or, on the other side, that it is a too annoying effect to stay in the game.
1. If you find this effect annoying, that´s your personal point of view, and may not represent the view of the community.
2. If you think it´s overpowerd, prove it! Bring examples! That´s the normal way to do things!
I asume, that you find this effect to annoying, and therefore want to remove it from the game in some way. But you know this won´t work, since it isn´t overpowerd, and there are enough veteran players who like this card. So you use the "this card dosn´t make sence"-cover, to remove the effect.
Well, I can tell you another thing. Dune Scorpion is weak. The only way you can play him is with a hyper-stall deck. The only way to encounter this Dune guy often, is to play AI3, about 8% (since there are like 12 or 13 AI3 decks) Everywhere else (PVP1, PVP2, Bronze-Platin Arena and AI4) he is nearly unused. I don´t know if there is a god who uses dune scorps.
So please state CLEAR what you want! What your REAL problem is! There are a lot of people here, wanting to help, wanting to discuss, but if you just cover your feelings, and don´t say the truth, I will let you scream alone in this thread. Because it´s annoying.
At the beginning of everything, you wanted the adding effect of the poison to stop as soon as the dune is removed from play. You still try that. You don´t try to make the card more realistic. You just ty to cover up that you don´t like it right now.