As expected, this level of value from simply tapping and sacrificing an artifact is highly problematic, and the card is banned in Legacy and restricted in the ultra-powerful Vintage format as a result
Generally, the rarer the misprint, the more its worth to the right buyer
Not to mention that theyre obvious houses for a lot of the treefolk discussed here
First, while a double-faced permanent is on the battlefield with its back face up, its mana value is calculated using the mana cost of its front face
The Flickering creatures which are a subset of the protective magic of white can often cause a loop
2019-01-25 If a nontoken, noncreature permanent becomes a creature after its already on the battlefield, it will have riot but it will be too late for the replacement effect to have any effect