Assuming you mean the school card when you say "regular" minotaur, the answer is pretty simple. Cards that go into your side deck, such as those obtained by pets or necklaces, are boosted cards. The cards are dark blue and do a little bit more damage or protect for a higher percentage than the school cards.
For example, the wraith card does 500 damage, while the charm you get from Kraysys gives the wraith card, which does 575 damage. Same goes for the life and death minotaurs.
why shouldnt it? Life has the least ammount of attacks and there they weakest, they derserve a spell that is powerful.
Life is not the weakest!
in attack it is but not the weakest I have soloed most of the game with my life wizard.life has a lot of healing and good healing at that. there is no weakest nor strongest school. all are good for a different look in the weakest school string and strongest school string i'm in one of those telling what I thinjk and what I think are better in different situations.
Last I knew the life minotaur could be used by any school, so if you are so jealous of the card as a myth, then get and use the pet yourself, if it isn't a good enough pet for you then you shouldn't be complaining about it (it isn't even a blade).