They are not considered to have been destroyed by battle or card effects, and cannot be prevented or redirected with other card effects
The Pokmon-themed tins are decorated with illustrations in all different styles
Inverted with Utopia
The effect of "Duke Archfiend" being used to send "Heiress" allows for access to many different avenues of play, from extenders like "Highness Archfiend" to access to Synchro plays through "Weiss, Lightsworn Archfiend", or even control tools like "Archfiend's Ghastly Glitch" and "Simul Archfiends"
This Jeskai commander also enables some really silly infinite storm count and infinite card draw combos with Sensei's Divining Top and a variety of cards like Birgi, God of Storytelling, Helm of Awakening, or Kykar, Wind's Fury
I think that classic movies like Night of the Living Dead are responsible for the prevalence of "the undead" coming up so often in the genre