However, on the other hand, a positive change is that all packs going forward from Scarlet & Violet on will have three guaranteed foil cards any cards that are Rare rarity or higher are now foil by default, so this means youll get more good cards while opening packs, despite them costing a bit more
If Tellah is no longer on the battlefield when its ability resolves and eight or more mana was spent to cast the spell that caused its ability to trigger, the ability will still deal damage to each opponent
Special Summon it, also you cannot Special Summon monsters for the rest of this turn, except Aqua-Type monsters
Check out the Alchemy: Tarkir Spellbooks article for details on those cards.
It's been proven beyond all doubt that the pack wheel in Pokemon TCG Pocket is just for show and that the pack that players choose makes no difference whatsoever, regardless of whether the corners are bent or the pack is flipped around on the pack wheel screen