The Mighty Oak is the first boss encountered in Epic Battle Fantasy 4. He is the guardian of Ashwood Forest, with his power over nature protecting much of the area from the effects of the cataclysmic meteorite impact that ravaged the rest of the forest.

Although he acts as a boss for the heroes to fight, the Mighty Oak is not a hostile creature. Instead, he serves to test the party's strength to determine whether or not they can withstand the trials beyond the forest. Once he is defeated by the party, he lends his strength to them as one of Anna's unique Limit Breaks.

In EBF5 Mighty Oak reappears as part of Anna's Limit Break in the fight with her, as well as one of her unique limit breaks. This time Anna comes with the limit break available the moment she joins the party.


The Mighty Oak is a huge humanoid golem mainly made of wood and bark. He also features some metal parts, likely to improve his durability and combat capabilities. His entire head seems to be made from a tree stump that has been cut off. Two round holes in the bark serve as Oak's eyes, and his lower jaw and feet are made of steel. He has a shield mounted on his left arm and a big metal pin on his right arm. The shield has two sharp metal spikes on the front end. Both arms also have large chains hidden within them, enabling them to be launched great distances. The Mighty Oak's head and shoulders also bear a few small twigs.

The Mighty Oak bears physical resemblance to both Golems and Wooden Idols. It is highly possible that the Mighty Oak was constructed and animated in the same way as a normal Wooden Idol, being a mass of wood brought to life by magic.


The Mighty Oak mainly relies on his great physical strength in combat, delivering powerful stomps and slams with his titanic body. His arms can extend on heavy chains to strike his foes from a distance, and he can jump surprisingly high to crush enemies or create damaging quakes. His control of the forest allows him to perform powerful Earth-based skills (such as Lumber and Gaia Blossom), and he can raise several of his own stats. Mighty Oak fights alongside an impressive battalion of forest creatures, and can summon infinitely many more if they go down.

Mighty Oak has the standard immunities to Stun, Freeze, Syphon, and Death. He is weak to Thunder and Bio, but especially weak to Fire and Dark. Mighty Oak is resistant to Earth and Wind. Unlike most bosses, Mighty Oak is actually weak to Burn and Tired.

Defeating the Mighty Oak on Epic difficulty will reward the player with the Lumberjack medal.


Icon bestiary ebf4 mighty oak Mighty Oak EBF4
A huge tree golem which uses earth attacks and protects the forest. Summons Wooden Idols, Red Bushes, Red Wasps and Fluffy Bats.
Stat HP Stat Attack Stat Defence Stat Magic Stat Mdef Stat Accuracy Stat Evade Exp AP SP Gold Hit2HP
3000 7 4 7 4 4 4 150 25 25 300 6
Element Fire Element Thunder Element Ice Element Earth Element Poison Element Bomb Element Wind Element Water Element Holy Element Dark
-80% -50% - 50% -50% - 50% - - -80%
Status Burn Status Stun Status Freeze Status Tired Status Poison Status Dispel Status Stagger Status Syphon Status Wet Status Weaken Status Curse Status Death
-100% 100% 100% -100% - - - 100% - - - 100%
StatDown Attack StatDown Magic StatDown Defence StatDown Mdef StatDown Accuracy StatDown Evade
50% 50% 50% 50% 50% 50%
Item Drop Rate
Icon Item Soft Wood Item Steel Plate Item Lanky Root Item Chain Link Item Emerald - -
Name Soft Wood Steel Plate Lanky Root Chain Link Emerald - -
Chance 100% 100% 100% 100% 100% - -
Status Damage
Damage taken from status effects, in % of maximum health (per turn), including elemental resistances:
Status Burn Burn Status Poison Poison Status Doom Doom
(if Death fails)
Status Regen Regen
1.512% 0.54% per stack,
up to 4.86%
Immune -4%
Final damage is randomized by ±5% (except for Doom) and rounded down.
Prior to the Battle Mountain update, Mighty Oak instead had 2300 base HP and 6.2 base Attack and Magic Attack.

Attacks and Abilities

Attack List
Attack Target Power Type Element Status Effect Acc Crit RdF
Shield Stab Single 50 Stat Attack ---- -- -- -- 100% 10% 10%
Shield Stab x2 Single 90/2 Stat Attack ---- -- -- -- 100% 10% 10%
Arm Shot All 33 Stat Attack ---- 33% -- Status Stagger 100% 10% 10%
Ground Pound All 40 Stat Attack 50% Element Earth 20% -- Status Stagger 90% 10% 20%
Notes: On Hard and Epic difficulties, is immediately followed by casting Log on a random player.
Log Single 30 Stat Attack 50% Element Earth 50% -- Status Stagger 100% 20% 10%
Notes: Is used only in conjunction with Ground Pound.
Lumber Single 80/3 Stat Attack 50% Element Earth 16% -- Status Stagger 100% 20% 10%
Gaia Blossom All 30 Stat Magic 100% Element Earth 50% 4x Status Tired 100% 10% 10%
Sharpen Self -- -- ---- -- 50%
Stat Attack
Stat Magic
-- -- --
Notes: On Hard and Epic difficulties, also applies 5x Status Brave Brave.

Battle logic

The following describes general logic of the enemy and attack patterns, with chances of each attack to be used. Conditions are listed from highest to lowest priority unless specified otherwise.

  • Berserked → Ground Pound;
  • ≥65% HP → Shield Stab (2/8), Shield Stab x2 (2/8), Lumber (1/8), Gaia Blossom (1/8), Sharpen (2/8);
  • <65% to ≥32% HP → Shield Stab x2 (1/6), Arm Shot (1/6), Ground Pound (1/6), Lumber (1/6), Gaia Blossom (1/6), Sharpen (1/6);
  • <32% HP → Arm Shot (2/6), Ground Pound (2/6), Lumber (1/6), Gaia Blossom (1/6). Passively summons a Wooden Idol every turn, with lower priority than the "every 3rd turn" ability.


  • Attempts to use Sharpen when Attack buff is ≥40% → Shield Stab x2;
  • Can't have more than 3 helpers at the same time.



As the first boss in the game, Mighty Oak is expected to not pose much of a challenge. While true for easier difficulties, on higher ones, Mighty Oak will show he's an actual boss and not just a stronger ordinary foe. Prepare accordingly.

First of all, learn Protect. Mighty Oak uses only Earth and non-elemental attacks, with only one of his attacks being magical. This early in the game, there isn't a lot of elemental resistance available to the players, so physical Defence buffs in form of Protect become the largest life saver. A character should also learn Heal More, which will be a big help to deal with area attacks and damage dealt from the lesser enemies.

Weapons and skills of Fire and Poison elements are recommended, as these are the Oak's main weaknesses, and many attacks of these elements can inflict Burn or Poison, further damaging the boss. Anna may use her starting Fairy Bow or get the Crimson Dragon bow from Greenwood Village equip shop for 3000 gold. Matt does not have access to any weapons of aforementioned elements yet, but he should take Heaven's Gate, as the other option is Wind-elemental and therefore will be resisted by the Mighty Oak, making Cleaver ineffective. Plus, Heaven's Gate gives a higher Attack boost. Natalie's Flameheart is the best offensive choice, though the Crystal Staff proves very useful due to its ability to Dispel Oak's massive attack buff with a high chance.

CharIcon Anna Anna
EBF4 WepIcon Fairy Bow EBF4 WepIcon Crimson Dragon EBF4 Hat Pink Flower EBF4 Arm Ranger Skirt
Flair Pocket Clock
CharIcon Matt Matt
EBF4 WepIcon Heaven&#039;s Gate EBF4 Hat Knight Helmet EBF4 Hat Headband EBF4 Arm Cowboy Shirt EBF4 Arm Viking Fur
Flair Potion Badge Flair Rock Badge
CharIcon Natalie Natalie
EBF4 WepIcon Crystal Staff EBF4 WepIcon Flameheart EBF4 Hat Leaf Clip EBF4 Arm Green Dress EBF4 Arm Flame Skirt
Flair Cat Badge Flair Clover Pin


Absolutely use Protect, as its Defence boost is crucial for survival. Try stacking it up to the maximum defence possible and keep it around this mark. Energy Drinks significantly buff a player's evade, helping to dodge incoming attacks.

Offensively, the player can constantly inflict stacks of Burn and Poison on the boss, even more so for Burn due to Mighty Oak's Burn weakness. These statuses will deal considerable to damage to the wooden giant over time. Inflicting Tired can also wear down Mighty Oak, gradually reducing the Accuracy of his otherwise devastating attacks. However, the only source of Tired at this point in the game is Gaia Bloom, which Mighty Oak resists. Anna can inflict Poison with Ivy and the Fairy Bow, while Natalie can inflict Burn with Flameheart. However, equipping Natalie with the Flameheart can cause trouble as mentioned below.

If Mighty Oak happens to sharpen itself, Dispel its offensive buffs immediately. The Crystal Staff's on-hit Dispel is probably the most consistent method of Dispelling this early in the game. The Heaven's Gate can also inflict Dispel via its Seiken unleash, but this is much more unreliable. If not Dispelled quickly, Mighty Oak will flatten the party, especially on higher difficulties. Even Defence buffs from Protect may not be enough.

Mighty Oak will constantly summon weak enemies such as Bats, Wasps, Idols, and Bushes. Whether or not these enemies are threatening is up to the player. It may be useful to take out the foes who attack after Mighty Oak in order to prevent them from killing off a weakened character.


  • The Mighty Oak may be inspired by the Great Deku Trees from The Legend of Zelda series.
  • In EBF4, the Mighty Oak is one of the few enemies in the series who is not killed in battle with the players. When his health is depleted, Anna comments that he isn't actually injured, just knocked onto his back and unable to get up, due to his bulk.
  • The Battle Mountain update of EBF4 introduced a new version of the Mighty Oak as an optional boss: the Armored Oak.
    • Defeating Armored Oak is supposed to give the existing Mighty Oak Limit Break a chance to show up as Armored Oak instead of normal Oak, dealing more damage than usual. However, this feature does not work due to a mistake in event flags.
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