Like most Magic: The Gathering cards, the value of Kenrith, the Returned King depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy: Through the Ages)
It will be interesting to see how much you need to build around this for it to be good and if an all in on creatures in the yard deck wants this
The reprint values also serviceable
With these, you can potentially create a one-sided-effect by eliminating all of your opponents creatures while leaving yours intact
My Top 10 Cards for Final Fantasy Final Fantasy is finally upon us
However, an ability like Sen Triplets makes it a prime target for your opponent's malice, making me think that you won't get to keep it in play as often as you think