This page lists every collectible that the Mastema mod adds, which is in total: 11 collectibles and 9 trinkets.
Every item has more info on their own page.
Collectibles[]
Activated Items[]
| Name | Icon | Charge | Quality | Description | Unlock Method |
|---|---|---|---|---|---|
| Consecrated Heart | 
"???" |
 |
 |
Gives 1 eternal heart on use.
After Chapter 3 floors, gives half a soul heart instead. |
N/A |
| Desecrated Heart | 
"???" |
 |
|
Can be used if there's at least 1 pip of charge.
When used at full charge, guaranteed to remove 1 broken heart. When used at less than full charge, chance to either remove a broken heart or deal 1 full heart of damage. The chance depends on the current charge. |
N/A |
| Bloody Harvest | 
"Ripe for the picking" |
 |
|
Spawns a random pickup that's surrounded by spikes.
Has a 10% chance to spawn a devil deal instead. |
Complete Boss Rush as Mastema
|
| Raven Skull | 
"Devour the seed of the land" |
 |
 |
Consumes all pickups in the room and grants a small, permanent damage up for each pickup consumed. | Defeat Mother as Mastema
|
| Infernal Covenant | 
"Let's make a deal..." |
|
|
Grants a passive item from the current room's pool and removes heart containers equivalent to a devil deal.
After being fully charged without getting hit, you get to keep the item plus the hearts that were taken are given back. If you get hit while recharging, the item is taken away and your hearts won't be returned. |
Defeat Ultra Greedier as Mastema
|
| Broken Dice | 
"Reroll... but at what cost?" |
 |
|
Rerolls all pedestal items and pickups in the room but gives 1 broken heart each use.
While held, removes 1 broken heart at the start of each floor. |
Complete Boss Rush as Tainted Mastema
|
Passive Items[]
| Name | Icon | Quality | Description | Unlock Method |
|---|---|---|---|---|
| Book of Jubilees | 
"7" |
|
Every 7th room cleared grants one of the following rewards:
Every 49th room cleared grants the effect of sleeping in a bed. |
Defeat ??? as Mastema
|
| Mastema's Wrath | 
"Slay the first-born" |
|
When entering a hostile room, the enemy with the highest HP will be marked.
Killing that enemy grants +2 damage up for the room. If the enemy is a boss or mini-boss, the damage persists between rooms but will slowly fade away. |
Defeat The Lamb as Mastema
|
| Torn Wings | 
"Fallen from glory" |
|
Entering a room with pedestal items spawns a Bloody Feather consumable, which can be used to reroll the nearest item to an item from the devil room pool.
+0.33 Tears up for each item and transformation you have that grants flight. Prevents flight for the rest of the run. |
Defeat Delirium as Mastema
|
| Bloodsplosion | 
"IT'S A BAPTISM OF BLOOD" |
|
Enemies have a 50% chance to explode and create a pool of red creep upon death.
The explosion deals your current damage and can spread status effects if the enemy died with any. Explosions caused by this item can't damage the player. |
Defeat The Beast as Mastema
|
| Sinister Sight | 
"Strike fear into their hearts" |
 |
+0.5 Tears up.
+2 Range up. Chance to shoot fear tears that also have homing. Feared enemies take 1.5x damage from all sources. Grants immunity to fear. |
Defeat Delirium as Tainted Mastema
|
| Sacrificial Chalice | 
"Spill your blood" |
|
Gain a chalice familiar that gets filled with blood each time you get hit.
Spawns devil-themed rewards each floor based on how many hits you took the previous floor. Not taking any damage on the previous floor has a negative effect. |
Defeat Mother as Tainted Mastema
|
| Corrupt Heart | 
"Consumed by darkness" |
|
+1 Black heart.
+0.25 damage up for each full black heart you have. All heart pickups have a 33% chance of being converted into either a black heart or black locusts. |
Defeat The Beast as Tainted Mastema
|
Trinkets[]
| Name | Icon | Description | Unlock Method |
|---|---|---|---|
| Eternal Card | 
"May the cards grant you eternal rewards" |
Using a card has a 10% chance of granting an eternal heart. | Defeat Isaac as Mastema
|
| Life Savings | 
"Spend your life away!" |
Beggars and machines that take health have a 15% chance to be played for free. | Defeat Satan as Mastema
|
| Twisted Faith | 
"Stray from the path of righteousness" |
Automatically smelted upon pickup.
Devil room items are free but only one can be taken. Angel room items cost hearts but you can take multiple. |
Defeat Mega Satan as Mastema
|
| Mantled Heart | 
"Safeguard" |
Picking up a soul heart has a 15% chance of granting a holy mantle shield.
30% chance when picking up eternal hearts. |
Defeat Ultra Greed as Mastema
|
| Ring of Shadows | 
"Darkness surrounds you" |
Taking damage has a 50% chance to create a black brimstone ring around you, similar to Maw of the Void.
The ring inherits your tear effects. |
Defeat Isaac as Tainted Mastema
|
| Shattered Soul | 
"Broken by sin" |
Adds an additional item to devil rooms that costs broken hearts.
The cost is equivalent to the item's quality. |
Defeat Satan as Tainted Mastema
|
| Satanic Charm | 
"Down the darkest path" |
+0.25 damage up for every item you've taken that cost hearts.
This includes items that cost broken hearts. |
Defeat Ultra Greed as Tainted Mastema
|
| Purist's Heart | 
"Power to the purest" |
1.2x Damage multiplier if you don't have any soul or black hearts. | Earn all Completion Marks as Mastema
|
| Spirit's Heart | 
"Weep what you sow" |
1.2x Tear multiplier if you don't have any red heart containers or bone hearts. | Earn all Completion Marks as Tainted Mastema
|