Variable stats on clones dont always matter, since often you want an ETB trigger or a static effect, but there are some exceptions ([mtg_card]Living Inferno[/mtg_card]), and its nice to have the option to make an arbitrarily large creature when you have mana lying around
Just look at these Baxcalibur and Lokix cards for instance
Taborax, Hope's Demise This 2/2 flying three-drop has lifelink with enough counters on it, and then when your nontoken stuff dies you'll toss one here
It does fit OP-01 reprint (white bottom), OP-02 reprint (white bottom), OP-03 through current OP-16. Also will fit and EB-01 - EB-03. Does not fit OP-01 original print (blue bottom) or OP-02 original print (red bottom) or PRB boxes
There isn't much talk in any of the competitive formats about a serious use of Tezzeret, Betrayer of Flesh, and you will only see a few casual commander lists pop up here and there