Availability date is not a guaranteed date, it depends to supplier availability
This is Out of Cards after all, a site where all the cards are about magic, monsters, and laying waste to your opponent
Reminder about The List and Special Guest: Special Guests and The List cards can appear in non-foil in Play Boosters, while only Special Guests can appear in traditional foil in Collector Boosters. Heres how the odds work: First, only 1 in 8 Play Boosters has any of these cards, and even if you get a booster with one of these, you dont have equal chances at each
1 Screaming Nemesis Get Wrecked For The Rest Of The Game The big flaw of every other card that prevents lifegain is that it needs to be on the battlefield to work
So knowing this about both Tentacool cards from this set and looking at this Tentacruel card, I could definitely see using a 1-1 line of the Ancient Trait Tentacool card and Tentacruel in a poison heavy deck