They don't let you do that because the final boss requires a VERY solid strategy, and if you don't have the cards needed to beat him, well, time to reload your save, back out of the arena if you saved there, and go build a deck prepared specifically for this boss
Recommended Cards Recommended Cards #KKGeneral-purpose cards #KK environmental measures #KK side deck #KKExclude #KKPermanent Magic #KK20AP #KKAcy #KK #KK #KKK #KKK Yu-Gi-Oh
in other words, it needs to be struck by an opponent before waking up and wreaking havoc
Description Drakloak (#886) is a swift Dragon/Ghost Pokmon known for its stealthy moves and mysterious aura
N Normal Champion's Vigilance X TRAP Counter If you control a Level 7 or higher Normal Monster, when a monster would be Summoned OR a Spell/Trap Card is activated: Negate the Summon or activation, and if you do, destroy that card