In the Commander format of Magic: The Gathering every card is legal to play except for banned cards and the ones illegal in all formats
All cards are securely packed
This doesnt change even if one or more of the spells you cast because of those cascade abilities has cascade itself
The mechanics are very similar and its gonna be pretty easy to just add three more to get threshold once you have four in your graveyard to get delirium
Terror of the Peaks (was $32 last year, now $43), Chromatic Orrery (continues to be in the $28-$29 range), Ugin The Spirit Dragon (was $20 last year, now $26) and the Grim Tutor (was $17 last year, now $20) are just a few of the big cards driving up prices on booster packs
As well as exiling opponents cards before they can hit the grave, Dauthi Voidwalker is an unblockable source of damage that can steal opponents best plays and put them to work for you instead