Since Job & Tainted Job got B-sides now,what if they have their own unlocks? Here are some concept features that I think could be included.

Unlocks for Job B:
Boss Rush:Peanut Buttermilk(Passive item,fires tears in the opposite direction of which one you are moving)

Mom's Heart on Hard:Job's Rag Piece(Trinket,Similar to Job’s Rags,but the fire rate boost is very small,& permanent.)

Satan:Book of Wisdom(Just so this item can appear in certain rooms when unlocked)

Isaac:Cosmic Orb(Passive,Similar to Zodiac,but grants one of the Planetariums’ effects in each room entered!)

The Lamb:Job's Wedding Ring(4-charge Active,Spawns Job’s Wife as an Ally for the current room)

???:Scorched Moon(Orbital,Blocks tears,spawns a wisp when it blocks enough tears.)

Ultra Greed:Job's Penny(Trinket,Collecting pennies boosts your fire rate by 0.05)

Ultra Greedier:The Anvil(6-charge Active,Upon use,you’ll be able to throw it towards the marker’s position! And then it will make a shockwave when it lands.)

Challange (C):Blacksmithery Smashing(Unlocked by Defeating Ultra Greedier as Job B)
Starting item:The Anvil
Treasure Rooms:Yes
Shops:No

Hush:Caregiver's Piece(Trinket,Entering an enemy room has a chance to turn it into a hallucination)

Delirium:Altar Fiend's Pouch(Passive,Upon entering another room,Item pedestals have a chance to Spawn another one.)

Mother:Job's Eye(Trinket,Gives the player Job’s Fire rate multiplier!)

The Beast:Lil' Apparition(Familiar,A friendly version the Haunted Apparition that dashes at enemies)

Mega Satan:Birthright Fragment(Trinket,Upon entering a treasure room,This trinket has a chance to destroy itself & reroll the item(or 1 of the 2 items) into Birthright!)
All completion marks on Hard:Extras for Job B

Unlocks for Tainted Unwavering(aka Tainted Job B):
Hush & Boss Rush:Soul of the Unwavering(Soul Stone,Grants Tainted Job’s passive ability,each future item pedestal will have a second once next to it,but upon entering the next floor,40% of your items are lost at random. As Tainted Job:+2 extra pedestals,but 67.5% of your items are removed. w/ Birthright:+3 extra pedestals,but 75% of your items are removed)

Isaac,Satan,The Lamb,& ???:Altar Fiend's Halo(Trinket,Adds a chance for a Praying Altar to replace other machines!)

Ultra Greedier:Reversed ? Card(Card,Activates a random active item effect upon use)

Delirium:Pocket Praying Altar(One-time Active,Spawns Altar Fiend for those who wish to have more items)

Mother:Altar Candle(Trinket,While holding this,Altar Fiend will take the trinket from you instead of giving you broken hearts.)

The Beast:Job's Hood(Passive,Collecting a passive item will have a chance to grant you another item!)

Mega Satan:Unwavering Beggar(A beggar that takes soul hearts & gives you Job's unlocks,& Tainted Job's positive & negative before disappearing,this effect lasts the current floor)

All completion marks on Hard mode:Extras for Tainted Unwavering

Let me know in the comments if you have any thoughts about these unlocks,I'm fine with it