Players wont want to attack you if you have the Witch-king around, and you can even protect it from removal by discarding cards, which leaves the door open to madness or reanimator synergies
Mermail Abyssocea could send a Mermail you control to the graveyard to summon Level 4 or lower Mermails from the Deck whose combined Levels equaled that of the sent monsters, which could set you up for certain Synchro or Xyz plays
Liberty Prime, Recharged isnt a bad card, it just fits better in the 99 rather than the command zone
Umbral Collar Zealot has the potential to unlock an aristorcrats style deck that can pressure on multiple dimensions, one of them being attacking, while the aristocrats plan is being set up
Yugi explains that "Mirage Ruler" activates whenever all of the monsters on his side of the field are destroyed during Atem's Battle Phase, bringing back his monsters and restoring his Life Points to what they were before his opponent's turn began, then paying 1000 Life Points, falling to 2400