>>51123426Nothing so far has indicated that you lose your original STAB, it's just assumed since that's sorta how other type changing things in the past have done.
>When a Terastallized Pokémon uses a move that matches its Tera Type and at least one of its original types, the boost to that move’s power will be even greater!The fact that it seems to specify the original type really seems to imply you are still retaining that original typing offensively.
Also, it's kinda garbage if it does remove your original STAB. It makes whole parts of your moveset worthless while Terastalized which I don't think they're aiming for. It seems more like the Tera Type is an overlay, covering your weaknesses but still letting the Pokemon have it's strengths.
