Graveborn

Bone honed sharper than steel. All units gain +1 attack damage. Current bonus: +0. Next tier: 100 gold (1/10).

Older bone holds together harder. All units gain +1 armor. Current bonus: +0. Next tier: 100 gold (1/10).

Reinforced bindings, denser bone. All units gain +5 max HP. Current bonus: +0. Next tier: 100 gold (1/10).

The dead never tire of swinging. All units gain +0.01 attack speed. Current bonus: +0. Next tier: 100 gold (1/20).

Raises your building cap by +1 each tier. Buy it when your food bar is full and you still want spawners or towers. Next: 500 gold.

Your skeletal fighters and spearmen attack 20% faster and hit for +2. One-time research that surges the whole melee line at once. Next: 500 gold.

Trade 200 wood for 100 gold. 180s cooldown - turn surplus lumber back into spending money.

Trade 100 gold for 100 wood. 60s cooldown between buys - top up lumber the moment a build needs it.

Trade 1,000 gold for 1,000 wood. 60s cooldown between buys - top up lumber the moment a build needs it.

Grants every unit on your team +5 Armor for 30 seconds. Does not stack - if an ally also buys it the timer just refreshes, never the bonus. 4 minute cooldown.