Jellen or gelun (Japanese: ジェルン) is a status infliction technique common to Phantasy Star games.

Phantasy Star series

Phantasy Star IV

In Phantasy Star IV: The End of the Millennium, gelun costs 5 TP to cast. It reduces all affected enemies' strength stat by an amount equal to the caster's mental stat. Each enemy's mental stat and bio sensitivity affect gelun's success rate. Enemies immune to bio effects, particularly machines, zombies, dimensional demons, ghosts, and most bosses, are immune to gelun.

Hahn is the only player character who can use gelun. He already knows gelun when he joins the party.

Phantasy Star Online series

Phantasy Star Online

When cast, jellen gives the target (always an enemy) the jellen status effect, which decreases the target's ATP. The amount of ATP lost to jellen is dependent on the target's base ATP level, plus jellen's technique level when cast. Jellen will affect multiple targets starting at level 3, and its range increases as technique level increases, along with the amount of time the effect lasts.

Jellen is a useful technique for all classes that can use it, as at higher levels it can significantly affect the amount of damage taken from an enemy's attack. Note that jellen, however, only affects physical attacks.

Jellen is the direct opposite of shifta. If a higher-level jellen is cast on a monster that has a lower-level shifta, the target will lose the shifta and gain the jellen effect; the same is also true of the reverse.

Jellen can also be cast on players. Some monsters, such as Migium and Mericarol will curse hunters with jellen and zalure with their attacks. Jellen can be cured with Anti level 6, a Sol Atomizer, or a shifta technique with a higher level than the jellen technique.

In the Dreamcast versions, jellen is available to all classes except androids. In newer versions, RAmars are also unable to use jellen.

Phantasy Star Online 2

Jellen is not available as a technique in Phantasy Star Online 2, but the ranger skill jellen shot for launchers has similar effects. Enemies affected by jellen shot have their S-ATK, R-ATK, and T-ATK drastically reduced.

Phantasy Star Online Episodes 1, 2, & 4
Character Classes HUmar - HUnewearl - HUcast - HUcaseal - RAmar - RAmarl - RAcast - RAcaseal - FOmar - FOmarl - FOnewm - FOnewearl
Important Characters Alicia Baz - Ash - Bernie - Calus - Elenor Camuel - Elly Person - Heathcliff Flowen - Kireek - Montague - Red Ring Rico - Rupika - Sue
Locations Pioneer II - Forest - Caves - Mines - Ruins
The Lab - VR Temple - VR Spaceship - Central Control Area - Seabed
Crater - Subterranean Desert
Weapons Sabers - Swords - Daggers - Partisans - Slicers - Handguns - Rifles - Mechguns - Shots - Canes - Wands - Rods
Katanas - Claws - Double Sabers - Twin Swords - Fists - Launchers - Cards
Items Weapons - Frames & Armour - Units - Barriers & Shields - Mags - Support Items
Techniques Foie - Zonde - Barta - Gifoie - Gizonde - Gibarta - Rafoie - Razonde - Rabarta - Grants - Megid
Resta - Anti - Reverser - Shifta - Deband - Jellen - Zalure - Ryuker