RF GhostFlame in Last Epoch is a highly specialized and intriguing skill belonging to the Warlock skill tree, introduced with the game's ongoing development updates. GhostFlame functions as a channeled ability that unleashes a continuous jet of horrid flames, dealing both fire and necrotic damage over time in a frontal cone. This dual damage type makes it a versatile offensive tool, particularly when combined with the unique mechanics embedded within its skill tree Last Epoch Gold.

A notable feature of GhostFlame is the conversion mechanics and ailments it applies. Typically, ignite and damned chance are converted into bleed chance for this skill, making it a potent application of bleed damage stacks. This conversion can result in exceptionally high bleed uptime and stacking, enhancing its damage over time output significantly. The skill also drains current health per second as a channeling cost, encouraging builds that optimize life leech and physical damage mitigation to sustain survivability during use.

The GhostFlame skill tree provides a variety of passive nodes that enhance its damage and utility. Among these nodes are increased ignite and damage duration scaling with intelligence, ward generation per cursed enemy upon stopping the channel, and a unique mechanic called "Memorial of Flames," where the flame persists briefly after channeling stops. Notably, the skill synergizes with newly introduced curses such as Decrepify applied by the "Screech" effect, which occurs after channeling GhostFlame, applying debuffs to nearby enemies and increasing damage dealt to feared targets, further amplifying the Warlock's control and damage potential.

From a build perspective, GhostFlame encourages a playstyle that balances aggressive damage output with defensive sustain. The high mana cost, around 80 mana per second, necessitates efficient mana management through idols, gear, and passives that reduce channeling costs or boost mana regeneration. Players often combine GhostFlame with health leech nodes and abilities, like Phantom transfusion, to offset its health drain, and optionally add secondary skills such as marrow shards or Chaos Bolts to improve single-target damage, a known weakness of this channeling spell.

Strategically, the lingering haste buff and ward gained after channeling stop offers a tactical advantage in combat, allowing players to weave in quick attacks or reposition while maintaining defensive ward layers. This mechanic incentivizes intermittent channeling rather than constant use, blending mobility and survivability into the build. The ability also scales well in low-life or ward-based defenses, making it an attractive option for Warlock players favoring a more intricate balance of offense and defense buy Last Epoch Gold.

In summary, RF GhostFlame in Last Epoch is a complex, channeling Warlock skill combining fire and necrotic damage with bleed application and curse mechanics. It features high mana and health costs offset by strategic passives, leech, and ward mechanics, rewarding players who invest in efficient resource management and build synergy. Its synergy with new curses and effects like Screech and Memorial of Flames distinguishes it as a versatile and deep skill for players seeking a challenging yet rewarding gameplay style in Last Epoch.