Lightning Weaver
Updated Apr 15, 2026
Eudora was the throwaway tutorial mage for nine years, then patch 2.1.47 quietly turned her into something else: a burst mage with real teamfight reach. Patch 2.1.61 ([patch notes](/patch-notes)) flattened her S1 cooldown to 5 seconds at every level. She is no longer the joke pick, but she is also not free. The 3-second Superconductor window decides every fight she enters.
Win Rate
49.26%
Pick Rate
0.79%
Ban Rate
2.53%
Burst
Emblem
Mage Emblem
Battle Spell
Sprint
Weak Against
Strong Against
In teamfights, use Eudora's 1st Skill to apply Superconductor to enemy heroes, then cast 2nd Skill on the right target for an AOE stun, and follow up with her Ultimate for a massive burst to the stunned heroes. Finally, use her 1st Skill again to finish off the enemy.
Eudora is a conditional pick. She wants a draft where the enemy team has at least two heroes that walk in straight lines, and at most one hero who can cancel her stun (Purify, Diggie, a Wanwan with passive points up). The 2.1.47 rework gave her bouncing Ball Lightning and an area follow-up off her ultimate, so she now has teamfight relevance she never had before. But "teamfight relevance" still means standing 6 meters from a stunned target while your team peels for you, and that math falls apart fast.
Lock her against immobile carries (Moskov, Clint, Layla, Miya), low-health-pool mages (Vexana, Aurora pre-spike), and slow-engage tank initiators (Tigreal, Atlas) who group enemies for her S2 bounce. Disqualify her when the enemy has Ling, Lancelot, or Helcurt without a peeler on your side. Disqualify her when two or more opponents will lock Purify (the spell trivializes her S2 stun and breaks the Superconductor window). Disqualify her when your own team has no front-line CC, because she does not create her own engage and the first 0.4 seconds of her combo are immobile.
If you cannot answer "who on my team locks down the enemy carry first" without naming yourself, Eudora is the wrong pick.
Eudora is not a "burst mage". She is one passive that doubles as her entire ceiling. Superconductor, the 3-second debuff her skills apply on hit, is the only reason to lock her over Aurora, Cyclops, or Vale. Every skill in her kit deals normal damage on first contact. Every skill in her kit deals real damage when it lands on a Superconductor-marked target.
That is the whole hero. The order matters because of the math. S2 (Ball Lightning) marks AND stuns at the same instant, which means the moment a target is marked they are also locked in place. Your S1 then fires into a stationary target with the bonus damage applied, and your ultimate calls down a follow-up area strike on the same spot. You lose this entire windfall if you open with S1 on an unmarked enemy. The base S1 damage hits, the Superconductor bonus does not, and your S2 stun is now landing on a target who watched the lightning come from across the lane.
Every other character note about Eudora flows from this. Her low S1 cooldown (5 seconds at every level after patch 2.1.61) is not so you can spam wave clear, it is so the bonus is available on the second mark inside a single S2 stun. Her 32-second ult cooldown is acceptable because the area follow-up after a marked hit makes it a teamfight nuke, not a single-target gimmick.
The spike is Genius Wand into Holy Crystal. Genius Wand drops at the 6-to-7 minute mark with average mid-lane farm and immediately gives you 10 flat magic penetration plus the stacking magic-defense reduction passive (3 stacks, refreshing on every skill hit). Two skills on a target shred enough magic def that your S2 base damage starts threatening 40 percent of an EXP laner's HP bar from a single mark. This is the spike that lets you start hunting side lanes between waves.
Holy Crystal lands around the 11-to-12 minute mark. The 21-to-35 percent extra magic power scaling on top of 185 base magic power is the single largest damage bump in Eudora's build. Before Holy Crystal, your Superconductor combo deletes ranged carries. After Holy Crystal, it deletes everyone except dedicated tanks. Plan your second rotation around the timing: when the item finishes, look for a side lane where the enemy has used their escape, and force a kill before they retreat to base.
The spike is wasted if you panic-buy Winter Crown ahead of Holy Crystal because you died once. You died because you walked too far up, not because you lacked defense. Buy Holy Crystal first; Winter Crown is a third or fourth slot, never a second.
The reflex when you see the enemy form up around their tank is to stand at max range and try to land Ball Lightning on the carry from across the screen. That reflex is wrong. Ball Lightning is not a sniper rifle, it is a mid-range mark that needs to land on someone whose silhouette your team is about to focus.
Three rules:
If your support is Tigreal or Atlas, you get to cast Ball Lightning the moment they ult, because the entire enemy team is grouped and stunned. If your support is Estes or Rafaela, you have to create your own opening by waiting for an enemy to overextend into your team, which means longer game timer per fight.
Locked slots: Magic Boots, Genius Wand, Holy Crystal. Magic Boots over Arcane Boots because the cooldown reduction matters more than 10 flat magic penetration once Genius Wand is online. Arcane Boots is fine if the enemy stacks magic defense early, but you are buying penetration twice in that case and one of those buys is a luxury.
The flex slots are where games are won. Walk through each:
The weakest common default is Lightning Truncheon. It synergized with the old pre-revamp Clock of Destiny build, but post-rework Eudora's S1 is already on a 5-second cooldown and the Resonate proc (every 6 seconds) gates extra damage you would already have from the Superconductor bonus. Buy it as a sixth item only if the game is already won and you want a slightly larger nuke on a cleared wave.
Opening with S1 on an unmarked target. You bait yourself into thinking the cooldown is short enough that you can fish for the mark. The mark only exists after a skill lands. S1 first means the bonus damage on the second hit is fishing for nothing, because Superconductor was never applied. S2 first means the stun lands, the mark lands, and the next two skills cash in. Always.
Walking up to range your S2 because it "looks shorter than the enemy is". Ball Lightning has a flight time. By the time the orb crosses the gap, a Lancelot, a Hayabusa, or a Lesley with Sprint has stepped sideways. Cast it from a position where the enemy's escape gets cut off (a wall at their back, a teammate on their flank), not from your maximum range.
Treating Helcurt as a silence matchup. He is not. Hidden Terror's Prowler-state passive terrifies enemies hit, which prevents skill use the same way silence does, but the trigger is different. He has to land Hidden Terror's blink hit while invisible. The play is to stay on the side of your front line he cannot path to without crossing your tank, not to "wait out the silence". His ult is the bigger threat anyway: Dark Night Falls reduces sight range for the entire enemy team for 3 seconds, and Eudora's combo is built around seeing the target you are casting on.
Forcing your combo into Lancelot's S2 or Ultimate. Lancelot is untargetable during Thorned Rose and invincible during Phantom Execution. Both windows last long enough to eat your Ball Lightning. If you see him use either, hold every cooldown until the animation ends. He has used his out; the next 8 seconds are yours.
Not respecting Baxia's passive. Baxia Mark reduces the final damage he takes by a flat 15 plus 1 per hero level. At level 15 that is 30 flat damage off every instance of yours, including the ult area follow-up. During his own ultimate, Baxia Mark's reduction doubles for 10 seconds. Your Superconductor combo into Baxia does roughly 70 percent of what it does into another tank. He is not your target. Mark him only to set up the bounce; commit your kill pressure into someone else.
Tip
Ball Lightning's bounce prioritizes enemy heroes over creeps. If you S2 a creep wave with two enemy laners standing near it, the orb bounces to the heroes. Use this to clear minions and apply Superconductor on enemy laners in the same cast.
Note
Animation cancel: cast S2, then immediately tap S1. The S1 cast goes off mid-S2-recovery and lands inside the stun window. Players who wait for the S2 recovery to fully play out give the enemy 0.3 extra seconds to react, which is enough for a Lancelot to dash sideways or a Fanny to cable away.
Tip
Ult buffer: queue your ult on the target before the Ball Lightning orb lands. The ultimate auto-fires the moment the stun applies, which produces the smallest possible gap between the mark and the area follow-up.
Note
Blue buff is mandatory after the patch 2.1.61 mana cost increases on S1 and S2. Coordinate with your jungler before the second blue spawn, especially in prolonged teamfight games where you cast all three skills more than once per minute.
