Since the Heisted card is face down, you dont know what your opponent has stolen and how to play against it
It turns every single creature on the battlefield into target creature you control, legendary or not
Whether evoke's sacrifice ability triggers when the creature enters the battlefield depends on whether the spell's controller chose to pay the evoke cost, not whether they actually paid it (if it was reduced or otherwise altered by another ability, for example)
(f) If the lot's failure to conform to its Authorship Warranty can only be shown by a scientific process which, on the date we published the Authorship description, was not available or generally accepted for use, or which was unreasonably expensive or impractical, or which was likely to have damaged the lot
Thing in the Ice is one of the few defender creatures that doesnt need external help to end the game