Tera Pokemon cant be hurt while on the Bench, which means you can build them up without fear of them being damaged though of course, this doesnt protect them from being moved to the Active Spot by cards such as Bosss Orders
Basically, magic is cast at regular intervals during a melee attack, but among the magic cast, there is a magic that gradually recovers HP, so if there is no trick to nullify it, the attack becomes very difficult
The 1998 PSA7 card is reportedly one of only two examples graded for that condition
Notably, protection and shroud also stop you from targeting your own permanents
The former were concerned about losing the value of their existing investments, while the possibility of cheap future reprints discouraged the latter from purchasing limited edition products
I am a little bitter you excluded gen 3 but you probably didnt want me to go off listing a ton of them