Then, in addition to the free spells, you wipe the board, too - Because whatever you cascaded into (or anything else you've happened to cast that turn) will damage all opposing creatures equal to their CMC
They're about Oblivion Ring
Its close enough

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Those stats are enough to make them worth considering, but not necessarily one of the best cards from Kamigawa: Neon Dynasty by itself
Theyre both fairly expensive as 6-mana planeswalkers that only enter with 4 loyalty each, but at least Will Kenrith can make casting Rowan Kenrith a little easier if you tick Will down