If the copied creature is a token, the token that's created copies the original characteristics of that token as stated by the effect that created the token, with the listed exceptions
Of course, this doesnt mean that these cards will all be powerful
A highly rendered digital artwork from 2019 is sent hurdling back twenty years in the past simply by changing its border
The second ability is potentially dangerous, lifegain creatures with fight effects could get really dangerous quickly, equip this into an Apex Altisaur and give it lifegain (a lot of tricky steps, yes, you need an equip at instant speed effect) and that thing will get huge and then just kill someone out of hand
Discard Spells: Court of Ambition, Bottomless Pit, Chain of Smog, Dark Deal, Divest, Hymn to Tourach, Mind Rake, Mind Shatter (you can change to Mind Twist), Thoughtseize, and Davriel, Rogue Shadowmage