What the glyph is
The Glyph of Fortification is a team button for building defense. On press, all your towers and buildings stop taking damage for a short time, and your lane creeps are briefly protected too. It is not a heal: health is not restored, damage is simply cancelled for a couple of seconds.
The glyph is shared by the team, cooldown 5 minutes. Buildings are immune to damage for 7 seconds, creeps for 3. It is protection from normal damage, not an absolute shield: press it deliberately to save a tower or win a lane, not on reflex.
What it actually does
The glyph applies immunity to damage to two targets at once — buildings and your lane creeps, but for different durations.
- Buildings. All your towers and buildings take no damage for 7 seconds — enough to survive a creep wave and the team's dive.
- Lane creeps. Your creeps are protected for 3 seconds: they cannot be last-hit or denied while the glyph is active. It used to be 4 until patch 7.38 shaved a second off.
- It is not invulnerability. The glyph reduces incoming damage but does not save from instant-kill effects such as Culling Blade — a creep under glyph can still die to an execute.
- One per team. The button is shared: one player presses it, and it is spent for everyone.
- Towers fire a volley. The most-forgotten part: under glyph, every tower of tier 2 and above attacks five extra nearby enemies at once instead of a single target. Tier 1 towers do not. On the high ground that turns a tower into a finishing tool.
The glyph ties directly into backdoor protection and tower tiers — how the buildings themselves work is covered in the towers and barracks guide.
How to use the glyph
The glyph has two main uses — defensive and lane control. Both come down to buying time and not giving up a resource — especially when the enemy presses one lane through a split push and you have to save the building on your own.
- Save a tower under push. The tower is at its last percent and defenders have not arrived yet — the glyph cancels the finishing hits and buys time to TP.
- Stop a fast push. If the enemy crashes into a building with a big wave or a stack, the glyph breaks their tempo and forces a retreat.
- Win a lane. Glyphing your creeps stops the enemy from last-hitting and denying them, helping you shove the wave to their tower.
- Wait for backup. Under glyph a building lives the extra seconds — exactly what allies need to teleport in and defend.
The glyph does not save every tower: if the enemy is set for a long siege, vision and control matter more. Where to place wards is in the warding in Dota 2 guide.
Cooldown and timing
The glyph's main resource is not the immunity itself but its availability. The cooldown is 5 minutes (300 seconds), one per team, and early in the game it is not open right away. Deciding when to spend it is part of tempo control: a spent enemy glyph opens a window for you to push.
- Five-minute recharge. Spend the glyph and the next is five minutes away. In that window the enemy can come with a second wave with no protection up.
- Don't press on reflex. A glyph for one or two saved points of tower health is almost always a waste.
- It opens around minute three. At the start of a match the glyph sits on its own 180-second cooldown — before that the button simply is not there.
- A falling building gives it back. The cooldown drops to almost nothing three times a game: when the team loses its first tier 1 tower, its first tier 2 tower and its first Melee Barracks. A tier 3 tower no longer gives the glyph back — that was removed in patch 7.36, which is when barracks were added instead. Losing your first T1 hands the team a fresh glyph to defend the T2 — which is why an enemy who just traded towers can suddenly close up again.
- Count the enemy glyph. If the enemy recently spent theirs, you have a window to push without their creep and building protection.
- A team decision. Because the button is shared, the one who sees the whole picture should press it, not everyone from their own corner.
Common mistakes
These slips leave the team unprotected at the worst moment, and small objective details like these are what add up to climbing MMR:
- A "just in case" glyph. Pressed without a threat, it goes on a five-minute cooldown — and the next attack lands for free.
- Waiting too long. Pressing the glyph when the tower is already falling is too late — press it before the finishing hit.
- Relying on it versus an execute. The glyph does not cancel instant-kill effects — it is protection from normal damage.
- Forgetting the creeps. A glyph on the lane at the right moment wins the creep equilibrium and a chunk of tower almost for free.
