You can pay two mana to exile it as you would with the mechanic, and then cast it on a later turn for two mana less than it would normally cost
Therefore, the best replacements for these cards are going to either be A) cards that generate value from sacrificing, or B) Cards that generate mana (potentially a lot of it to allow for big loops)
Overall, during the Sword & Shield era, English cards had huge global visibility and sometimes inflated prices due to a wave of new collectors and investors, while Japanese cards offered an alternative for collectors priced out of English cards
If youre in the business of collecting, then prepare to shell out thousands
They also show off the sets new mechanics, many of which are reminiscent of concepts used in sets from the regular Magic line
This bucket is why lifegain overlaps so well with a good card-advantage plan the two engines feed each other