The effect itself doesnt have to target the equipped creature either, which means you could stick it on whatever you want and make something else 1/1 and unblockable, negating the need to re-equipped if the other creature gets removed
Although the sacrifice mechanic was introduced in Alpha, sacrifice was only made a keyword action in Revised, the first core set
Not to mention its a fun set all around and, for what I consider a cheap price for the potential value inside, I definitely recommend it
Most two mana counterspells can find a home, and often 1 mana ones will always be a staple somewhere - this has the flexibility of being both, and has some pretty powerful targets
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