Imperial Iron Wall is a good set with lord of the heavenly prison, because it won't get banished if u flip it up before EP of the next turn ofc. And if you already drew the imperial iron wall with lord that just means Lord can set any spell/trap from your deck that won't get banished. Subterror is one of the few control decks that can play this card + it hits the most represented decks in some ways (mirrorjade can't banish + BiR can't fuse; tenyis, protos + Taia in swordsoul; PKs can't banish from gy, enchantress can't search rite and floo just gets completely wrecked). It only really hurts with pot cards, called by and Trap Trick. I would personally play less cards that banish (remove the called by and put in gozen for example). Iron wall with guru + fiendess in hand + some backrow also means that they can't out your backrow (the most common out to a fiendess negate of a wipe like duster is called by which can't be chained to fiendess because of iron wall).