World Tree Defender - Seedling of Yggdrasil

A hex-grid tower defense adventure where you shape the battlefield, grow a living World Tree, and unleash elemental combos against relentless enemies.

About the Game

World Tree Defender is a strategic tower defense built on hex grids, elemental synergies, and real-time spellcasting. Choose your heroes, build your towers, and cast powerful spells to defend the World Tree against waves of relentless enemies.

Explore three distinct biomes — each with its own strategic opportunities and dangerous weather effects — while collecting soul relics that unlock deep build customization and new abilities.

Every run is a fresh puzzle: terrain shapes your towers, weather twists your plans, and the relics you equip decide whether you chase raw power or build an unshakeable foundation.

Key Features

• Infinite hex-grid maps — terrain that matters, with natural chokepoints, hidden groves, and shifting weather.

• 10 unique towers across 5 hero branches, each with specialization upgrades.

• 8 castable spells — real-time abilities to turn the tide when your towers aren't enough.

• 6 soul relic slots — mix-and-match loadouts with Crown, Heartwood, Canopy, Branch, Bark, and Root relics.

• 3 distinct biomes — Verdant Veil, Cinderheart, and Miremaw, each with weather effects that reshape the battlefield.

• Custom map editor — design and share your own hex-grid battlefields.

Biomes

Verdant Veil — Nature

A lush forest realm teeming with ancient magic. Towering trees form natural chokepoints while hidden groves conceal powerful defensive positions. Master the terrain to turn nature itself into your strongest ally.

Weather effects:

• Overgrowth 

• Spore Cloud 

Cinderheart — Volcanic

Rivers of molten rock carve through scorched plateaus. The volcanic terrain offers devastating fire synergies for those bold enough to harness its destructive power — but the heat spares no one.

Weather effects:

• Ashfall 

• Magma Surge

Miremaw — Swamp

A treacherous marshland where fog obscures the battlefield. Winding waterways slow enemy advances while the murky depths hide dangers — and opportunities — for cunning defenders.

Weather effects:

• Rootrot 

• Toxic Fog 

 Towers

Every tower belongs to one of five hero branches, each led by a distinct character with their own playstyle.

Craft 

• Turret (Tier 1) — Fires explosive rounds dealing splash damage.

• Flame Thrower (Tier 2) — Short-range tower that sprays fire in a cone, igniting enemies.

Vigilance 

• Sniper Nest (Tier 1) — Extreme range, massive single-target damage. Marks hit targets for bonus damage.

• Storm Caller (Tier 2) — Launches salvos of rockets that explode on impact. Hits marked targets harder.

Discovery 

• Alembic Tower (Tier 1) — Throws elemental potions at enemies, applying random effects.

• Spark Pylon (Tier 2) — Emits jolts of unstable energy that chain between nearby enemies. Chains deal bonus damage to debuffed enemies.

Wisdom 

• Moon Well (Tier 1) — Radiates lunar energy that buffs the damage of nearby towers. A pure support tower.

• Grove Warden (Tier 2) — Summons spirits of the ancient forest that haunt and curse enemies, reducing their effectiveness.

Might 

• Water Wave (Tier 1) — Periodically releases a wave of water in all directions, drenching enemies with the Wet status effect.

• Frost Pillar (Tier 2) — Emanates a freezing aura that slows nearby enemies. Wet enemies are slowed more severely.

Active Spells

Powerful abilities you cast in real-time to turn the tide of battle.

• Bloom Burst (Nature) — A wave of restorative energy pulses outward, mending damaged defenses.

• Chain Lightning (Storm) — An arc of electricity leaps between foes, growing stronger with each bounce.

• Earthen Wall (Earth) — Summon a barrier of stone that blocks the enemy path entirely.

• Wildfire (Fire) — Ignite a zone of raging fire that scorches all who pass through.

• Frost Nova (Frost) — A flash-freeze explosion locks all nearby enemies in solid ice.

• Nature's Wrath (Nature) — Thorned vines erupt from the ground, ensnaring and crushing foes.

• Solar Beam (Celestial) — Channel the sun into a devastating beam of concentrated light.

• Mana Storm (Arcane) — Unleash a vortex of raw mana that supercharges all nearby towers.

Soul Relics

Equip six relic slots to shape your run. Upgrade, salvage, and reforge your relics to unlock powerful synergies — every relic drop shapes your strategy. Will you chase mythic power, or build a resilient foundation?

• Crown — Ultimate power & spells.

• Heartwood — Global damage & Life Energy.

• Canopy — Range, auras & crowd control.

• Branch — Tower specialization.

• Bark — Tower health & Root Reserves.

• Root — Resource generation & Bloom.

Custom Map Editor

Build and share your own battlefields with the free in-browser World Tree Defender Hex Map Editor. Design challenging maps, plan routes, and share them with the community.