Especially when you can stack something on top of your library like Thunderous Wrath
Pandemonium is a bit of both, allowing you to deal damage each time Norin nopes out, but also allowing your opponents a chance to deal serious damage, making the game feel a lot more dangerous
By using his -5 ability, you will get to create 2 additional Jace, Cunning Castaway tokens
This card looks great , is readable, and should play great in the right shell
You can copy the second ability when non-tokens enter the battlefield, but you cant copy the first ability which chooses the type of counter Denry Klin has when it enters
To stop the transmute youd need a spell like Voidslime that can counter activated abilities, or a spell like Discontinuity that ends the turn while voiding the stack