The extra Red Heart container can exceed the maximum Coin Heart container limit of Keeper, allowing him to obtain more than 3 Coin Heart containers.
Depending on the character used, this item only affects Red Heart containers, Soul Hearts (???) or Coin Heart containers (Keeper). It does not affect The Lost.
The Red Heart container gain is not retroactive - picking it up at 99 coins will not grant 4 extra Red Heart containers.
However, picking it up at 99 coins and then dropping below 99 coins will lose a Red Heart container, decreasing the feasibility of picking this item up the more coins you have.
The player will die if they lose their last form of health as a result of Greed's Gullet.
If Keeper drops to under 2 Coin Heart containers as a result of Greed's Gullet, or by any other means (Devil deal, etc.), he is unable to use an HP Up to increase his health back to 2 and has to regain the lost coins to do so.
If Greed's Gullet is rerolled away after gaining health, the extra health will be preserved even if the player loses the coins afterward.
However, if this happens with Keeper, his health will drop back to 2 Coin Heart containers upon picking up an item, unless another Greed's Gullet is picked up.
The Red Heart containers granted by Greed's Gullet are now retroactive - picking the item up at 99 coins will immediately grant 4 Red Heart containers. Consuming coins will still cause Isaac to lose Red Heart containers.
This also applies in reverse; consuming Red Heart containers granted by Greed's Gullet through methods such as Devil Room items or Guppy's Paw will cause Isaac to lose an appropriate amount of coins.
For Keeper specifically, Greed's Gullet in combination with Deep Pockets allows him to bypass the 12 heart container health limit, capping at 15 Coin Hearts at 999 coins. However, additional heart containers beyond 12 will not appear on the health bar.
Be careful when buying items from the Shop, as it can remove Red Heart containers.
This page was last edited on 9 April 2021, at 00:33.
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