Eldlich engine with the other Lord himself Raviel!
Fallen Paradise for the amazing Pot of Greed and protection of your sacred beast
Fallen Paradise will protect Raviel if you get him out.
Shimmering Scraper is for the OTK and for fallen paradise if you need a Sacred beast to draw additional +2 cards after your draw phase
Opening of the spirit gates can be easily used with Eldlich engine, with cursed eldland. Use cursed eldland to add Golden Lord and use Opening of the spirit gates to bring back a 0/0 monster by discarding Golden Lord, then use Golden Lord effect to bring himself to hand and special summon by sending the cursed eldland you used , and you can discard any golden land/ Golden Lord with cursed eldland 2nd effect. Then since Golden Lord is a lvl10 on the field, you can use Opening of the spirit gates 3rd effect, to add Cursed Eldland from your GY to your hand.
Darkest Diabolos is an easy card to get out and makes your opponent send a card from their hand back to their deck.
Metal Reflect slime/ Egyptian God Slime can be used for rank 10 xyz spam....Fusion material to bring out Phantasm Emperor....to summon Shimmering Scapper (if needed for Fallen paradise) or just for flat out protection for your other monsters on the field.
Sacred Beast awakening has 4 effects. you are mainly using the +1 &+2 effects and the last effect. +1 effect gives you life points if a Sacred Beast in on your monster zone, and each time your opponent summons/special summons, Gain life points equal to the monsters' attack. +2 sacred beast on the field basically "skill drains" your opponent side of the field and you still gain the +1 effect. The last effect states that if you have a lvl 10 (golden lord/Raviel/egyptian god slime) you can add a continuous trap from your graveyard to your hand. I usually add back Metal reflect slime since its an easy lvl 10 and can be recycled over and over again. Easy XYZ 10 spam and you can use Opening of the Spirit gates last effect to recycle a continuous spell card.
1 Greater poly is a great tech card since you do not want to banish everything with Dimension Fusion Destruction and gives the secondary effects to your fusion monster which is Phantasm Emperor (only needs 3 lvl 10's) which isn't protected under Fallen Paradise and the added extra effects goes will with that card. You can always Anaconda either fusion cards anyways so take your pick!
This deck kinda struggles with handtraps so theres +1 called by the grave, +3 gravediggers to deal with them.
The extra deck is mainly to either otk/burn your opponent
basic eldlich engine :
+3 Conq, +2 Hauq, +3 cursed, + 3 Scarlett, +2 Golden Lord
Basic Sacred beast engine:
+3 fallen(i like it at 3), +3 Opening, +3 Beckoning, +3 Summoning, +2 awakening and total of +5 Raviels
Thank you and let me know if you can make it any better!!