Crash with Prism of Light and Slimebound

[PricklyPorcupine]

Starting a new game as Slimebound, chose a random event as a reward from Neow and got an instant crash.

22:52:15.985 INFO dungeons.AbstractDungeon> Game Seed: 5606218415719667385
22:52:15.985 INFO infinitespire.InfiniteSpire> adding initial quests
22:52:16.009 INFO dungeons.AbstractDungeon> Map generation time: 36ms
22:52:16.009 INFO dungeons.AbstractDungeon> [INFO] Elite nodes identified: 6
22:52:16.010 INFO dungeons.AbstractDungeon> [INFO] Emerald Key placed in: [3,7]
22:52:16.052 INFO potions.UpgradedPotion$UpgradedPotionSave> Saving upgraded Potions
22:52:16.053 INFO saveAndContinue.SaveFile> Next Room: com.megacrit.cardcrawl.rooms.MonsterRoom
22:52:16.054 INFO replayTheSpire.ReplayTheSpireMod> Saving Data
22:52:16.055 INFO infinitespire.InfiniteSpire> InfiniteSpire | Saving Data...
22:52:16.059 INFO HubrisMod> Saving Data
22:52:16.060 INFO helpers.AsyncSaver> Enqueue: qsize=0 file=saves\1_SLIMEBOUND.autosave
22:52:16.060 INFO helpers.FileSaver> Dequeue: qsize=0 file=saves\1_SLIMEBOUND.autosave
22:52:16.060 INFO helpers.File> Attempting to save file=E:\Steam\steamapps\common\SlayTheSpire\saves\1_SLIMEBOUND.autosave
22:52:16.071 INFO helpers.File> Successfully saved file=E:\Steam\steamapps\common\SlayTheSpire\saves\1_SLIMEBOUND.autosave
22:52:17.228 INFO neow.NeowEvent> 1
22:52:17.228 INFO neow.NeowEvent> BLESSING
22:52:17.229 INFO neow.NeowEvent> COUNTER: 0
22:52:19.078 INFO audio.MusicMaster> Properly faded out MENU
22:52:19.128 INFO neow.NeowReward> [ERROR] Missing Neow Reward Drawback: NONE
22:52:20.111 INFO dungeons.AbstractDungeon> UNSPECIFIED CASE: NONE
22:52:20.111 INFO dungeons.AbstractDungeon> WARNING: Attempting to fade in even though screen is not black
22:52:20.113 INFO helpers.EventHelper> ---------------------------
ERROR: Unspecified key: Prism of Light in EventHelper.

22:52:20.114 INFO basemod.BaseMod> Looking for custom events...
22:52:20.117 ERROR core.CardCrawlGame> Exception caught
java.lang.NullPointerException: null
at basemod.CustomEventRoom.onPlayerEntry(CustomEventRoom.java:13) ~[BaseMod.jar:?]
at com.megacrit.cardcrawl.mod.replay.vfx.campfire.CampfireExploreEffect.update(CampfireExploreEffect.java:202) ~[ReplayTheSpireMod.jar:?]
at com.megacrit.cardcrawl.dungeons.AbstractDungeon.update(AbstractDungeon.java:2682) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.update(CardCrawlGame.java:876) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.render(CardCrawlGame.java:427) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126) [desktop-1.0.jar:?]