Nightmareheart is a black tom with a red muzzle, white ears and blue eyes. He is a warrior of Past TimeClan. Nightmareheart is roleplayed by Phoenix.
He is first seen talking with Timestar, Firedawn and Spaceslash about TimeClan's future when Bubblefrost appears in front of them. The cats escort Bubblefrost to the temporary camp. He shows an interest in the present-day warrior. He is called to speak with Timestar about if he visits the Dark Forest, which he responds no. As the Clan migrates to new hunting grounds, he is asked by Rainbowfeather if he is okay, to which he responds yes.
He is seen in a vision of Phoenixfeather's about the Dark Forest taking over the Clans if left alone. Nightmareheart is confirmed to reside in the Dark Forest at that moment. In the Darkfire battle, he fights Phoenixfeather and is killed again.
However, long after the battle, he is seen floating in darkness and swears revenge.
Somehow, Nightmareheart is resurrected and taunts the prophecy cats about the Distortion World cats. It is implied that, because Snowheart hates him, Horrible Snowheart, her evil counterpart, falls in love with him. Nightmareheart searches for two of his kits, Eclipsekit and Ebonykit, but is chased out, only for Thorntiger and Batwing to take his place.
When Bladeshark falls, Nightmareheart appears with the eleven RobotClan warriors who betrayed Gustwind badly injured. Tatteredbook cries for her parents, Pantherstorm and Sharkstorm. Nightmareheart leaves the cats to face Mistfang and Birchtree.
Later on, he forcibly mates with Phoenixfeather by dragging her into the snow.
As Lavenderheart and Copperbreeze (former Bladeshark) go hunting, Nightmareheart waits for the two cats to move into different positions so he can mate with Lavenderheart. When Lavenderheart thinks she hears a bird and moves away from Copperbreeze, Nightmareheart leaps out and drags her away to mate with him.
He soon forcibly mates with Mistbreeze, and most of the Dark Forest follows, showing Nightmareheart is ruler of the Dark Forest to some extent, claiming any she-cat they can. Phoenixfeather puts up a forcefield to protect the prophecy cats.
Getsugaclaw soon fought him, and Phoenixfeather and Ebonykit managed to finish him off.
However, Phoenixfeather soon has a vision where Nightmareheart most likely saved Lunaheart from death.
Just as Nightmareheart was about to vanish forever from being killed by Phoenixfeather and Ebonykit, he realized Lunakit would die, and thus decided to save her.
Before his treachery is discovered, he is a bit of a gentleman, offering his nest for Bubblefrost. In the Darkfire battle and all Dark Forest posts of him, he is cruel and cold. He has no regrets upon his death.
Zoey has said the right word for him would be "rapist".
Tatteredbook (formerly) - Alive
Bubblefrost (formerly) - Alive
Phoenixfeather (formerly) - Alive
Lavenderheart (formerly) - Alive
Mistbreeze (formerly) - Alive
Curseheart (formerly) - Alive
Shadowclaw - Deceased, StarClan
Talcshine - Deceased, StarClan
Beauty - Alive
Beast - Alive
Yuki - Alive
Serene - Alive
Ebonykit (TimeClan) - Alive
Himeheart - Alive
Dawnlight - Alive
Dusklight - Alive
Eclispekit - Alive
Grassdawn - Alive
Snowdusk - Alive
Ebonystorm - Alive
Bugkit - Alive
Hydrokit - Alive
Barkkit - Alive
Magmakit - Alive
Sorakit - Alive
Snowheart - Alive
Lightningheart - Alive
Lilyflower - Alive
Icewhisper - Alive
Runningstreak - Alive
Tigerflower - Alive
Rosedawn - Alive
Fairyhope - Alive
Cloverwish - Alive
Windscent - Alive
Raineblitz - Alive
Clouddrift - Alive
Firetornado - Alive
Starduststorm - Alive
Flamedragon - Alive
Dragonstream - Alive
Stormdusk - Alive
Beaststorm - Alive
Cinnamonbear - Alive
File:Nightmareheart.pokemon.jpegNightmareheart as a Pokemon/Actual Nightmareheart
- He is based off the Pokemon character Darkrai
- It is confirmed he reincarnated as Lunaheart.