Edmund only got one card, so he wanted to (rightfully so) add a little more
Kaya the Inexorable Kaya the Inexorable protects one creature at a time, but few protection spells protect a creature from being exiled as well as destroyed
In Commander its an auto-include in colorless or artifact deck, too
Japanese boxes on the other hand are likely to be both very rare, and fairly pricey, with MSRP reportedly set around $340 USD in that country as well, but with likely street prices that could exceed $400-$500 with relative ease
There are 5 common two-color lands (7.1%) that can be found in these slots
This makes this Kaito uniquely vulnerable, but at the same time, incredibly powerful for a blue and black planeswalker