side deck is just for extra disruption/board breaking, not really necessary
the event limited lady labrynth to 1 which is lame but if she's in the GY you can get her back with big welcome or labrynth labrynth
the lair of darkness package is also pretty optional but its free interaction with your opponent (no seriously people will just click buttons when that thing proc's on the end phase) and can let you tribute your opponent's monsters instead and generate advantage (you could also slot in lilith to search the traps easier but i dont have her so thats why i dont run it)
(lair of darkness also lets you tribute your opponent's monster for epidemic virus and lets you summon starving venom for free if your opponent has 2 monsters so have fun)