Four damage to a creature for 3 seems OK but 4 mana to also do them three seems like a very bad Searing Blaze indeed
Both the new sets and the new mechanics appear to have had an effect on the most valuable cards for this year
However, if by some terrible luck you do struggle to flip your manifested creatures, you can rely on a backup plan of Experimental Lab / Staff Room or simply pay the card's mana cost at any time
The other two - Mickey Mouse, Friendly Face and Elsa, Gloves Off - will be included in Rise of the Floodborn when it releases on November 17th
Of course, you need to find people who are interested in what you have to sell, and your LGS isnt always going to want those boxes of bulk you have lying around
Tokens act the same way as other permanents, but if they are removed from the battlefield (such as being returned to their owner's hand or sent to the graveyard), they cease to exist