Modeling Clay

**Modeling Clay** is an unlockable trinket added in *The Binding of Isaac: Repentance*.

## Effects

* Has a 50% chance to mimic the effect of a random passive item from the current room’s item pool when entering a room.

## Notes

* Modeling Clay can only mimic items that have the "`summonable`" item tag, the same way  selects the wisps it summons.
* The item given by Modeling Clay is seeded and based on the room Isaac is in.
* Items that would give or remove consumables or heart containers will not do so if Modeling Clay mimics them.
* If Isaac holds multiple copies of Modeling Clay, they will all mimic the same item.
	+ Note: This will not give multiple copies of the item, Isaac will only receive one copy.

## Synergies

* Golden Trinket / : Increases the chance of triggering to 100%.
* : Permanently increases Isaac's stats when it transforms into an item that surpasses Isaac's current stats.

## Interactions

* : Removes the room pool constraint for Modeling Clay's available items.
* : If Modeling Clay is currently mimicking a viable familiar, it will also be sacrificed and spawn an additional Devil Room item, but Modeling Clay will not be destroyed.
* : Modeling Clay cannot copy glitched items; it will do nothing and not have a sprite if it tries to.
* : Temporary items are affected by Sacred Orb.

If Modeling Clay mimics the following items, they will behave in the following ways:

* : 1-room charge active items will not recharge over time. Other active items are affected normally.
* / : Allows Isaac to hold another trinket alongside Modeling Clay if he picks it up while Modeling Clay mimics the item, and he will continue to hold both even after Modeling Clay changes. If Isaac tries to pick up another trinket while he already has two, it will instead be destroyed and he will only be able to hold one trinket again.
	+ Isaac can safely exchange cards/pills/trinkets by manually dropping them, at the cost of being unable to hold two.
	+ Extra trinkets held this way are susceptible to not working properly, if at all.
* : Does not remove the current floor’s curse.
* /  /  /  / : Stat boosts will not persist after Modeling Clay changes. If it mimics that item again, it will remember the stat boosts they gave.
* /  /  / : Does not reveal rooms on the map.
* / : Stats granted from picking up hearts will persist after Modeling Clay changes.
* / : If Isaac can somehow meet the requirements for these items to spawn familiars, the familiars will persist for only one room after Modeling Clay changes.
* / : Has no effect, even if Isaac uses his active item.
* /  /  / : Will reveal/open neighboring Secret Rooms.
* / : Pills’ effects will be changed, but they will not be identified.
* : The familiar respawns every time the trinket mimics the item.
* : Items that are spawned while it’s being mimicked will cycle between 5 different items, even after Modeling Clay changes.
* / : If Isaac can enter a trapdoor to the next floor while it’s being mimicked, they will have their normal effects.
	+ Other items that activate on floor transition (such as , , or ) will not work.
* /  / : Allows Isaac to hold two cards and/or pills if he picks them up while Modeling Clay mimics the item, and he will continue to hold both even after Modeling Clay changes. If Isaac tries to pick up another card/pill after Modeling Clay changes, the inactive card/pill he was holding will be destroyed and he will only be able to hold one card/pill again.
	+ If Isaac goes to a new room while Modeling Clay mimics Starter Deck/Little Baggy, cards/pills in the new room will be converted appropriately.
* : The special trapdoor will not spawn.
* : Does not reroll items, unless carried to another floor.
* : The unique spikes will not spawn.
* : If Isaac picks up another active item while Modeling Clay mimics the item, the other active item is dropped after Modeling Clay changes.

## Strategy

Modeling Clay can open additional advantages if a particularly helpful item is chosen for a given room. Exploring all rooms to see what effects are available may be worthwhile to gain the most value of the trinket:

* Explosive shots: Allows Isaac to destroy rocks and open Secret Room doors without spending resources.
* Damage-triggered items: To gain extra value from using Machines/Beggars that take health or Sacrifice Rooms. Note that stats given by on-hit items will not persist outside the rooms they were used in.
	+ can be used first to spawn a white poop next to a Machine/Beggar that takes health to give Isaac the chance to resist damage taken from using them.
* : Allows Isaac's active item to be overcharged; overcharging will persist after Modeling Clay changes.
* / : Reduces the damage taken from Sacrifice Rooms to half a heart, allowing Isaac to use them more.
* : Cards and runes’ effects will be stacked if used while it mimics the item. The game will remember what cards and runes were used if it turns into Echo Chamber in the future, even on later floors.
* /  / : Bad pills will be their good counterparts while mimicking these items, making them much safer to use.
* : Allows trinkets to be smelted if Isaac can deal damage to himself while it mimics the item.
* : Lets Isaac heal off explosions in the current room. Can be used to greater effect in rooms with TNT or Bomb Bums.
* : Items will restock themselves as normal.
* : To gain a Soul Heart if at low health. This will not work if the damage source is considered "health donation", such as from a Blood Donation Machine, Devil Beggar, Confessional, or Hell Game, but it will work for Curse Rooms and Sacrifice Rooms.
* : Isaac’s active item can be instantly recharged at the cost of red hearts.
* : Shop items and pickups will be discounted.
* : Cards will have their effects boosted.
	+ Notable cards are  for getting rid of Greed in shops and  for effectively .

## Trivia

* The trinket's icon appears to be a clay model of Meat Boy from Super Meat Boy, another game by Edmund McMillen.
* The item is a direct reference to the item of the same name in The Binding of Isaac: Four Souls, which turns into another available item when used.
* In addition, the item is possibly a reference to the Self-forming Clay item from the rogue-like deckbuilder Slay the Spire