Keystones
A keystone changes a rule of your build and carries a downside that pays for it. You can have two from the tree at once.
| Keystone | What it enables | The price |
|---|---|---|
| Signature Spell | One chosen spell gets an extra glyph slot | Every other spell deals 15% less Damage |
| Blood Magic | Spells cost life instead of mana | No Mana Regeneration |
| Bulwark Stance | Block also works against spells; melee hits you at most once per half second per attacker | 30% less Damage without a shield. Not yet in the game |
| Evasive Instinct | Evasion also applies to monster spells, at half strength | You cannot Block; Armour counts half |
| Average Strikes | Your hits always roll average damage | You cannot Critically Strike. Not yet in the game |
| Crimson Pact | Life Leech and Life on Hit doubled | No Life Regeneration; healing from spells and potions halved; 33% less Maximum Life |
| Hunter's Reservoir | Flask effects doubled | Flask charges only from rare monsters (8) and bosses (40) |
| Spellblade | Attacks trigger your first spell at 25% of its damage | Not yet in the game |
| Elemental Overload | Your elemental hits ignore enemy resistances | Your Elemental Resistances capped at 30%. Not yet in the game |
| Harmony Engine | Hits build harmony; at five your marked spell is free and critical (The Harmony Engine) | Other spells cost 20% more Mana |
| Ghost Reservation | Passive spells reserve no mana | Passive spells 50% weaker; 20% less Maximum Mana. Not yet in the game |
| Glass Cannon | 25% more Damage | 25% more Damage taken |
| Wardbound Oath | Life Regeneration, Life on Hit and Life Leech restore Energy Shield instead | Energy Shield no longer recharges by itself |
| Mind over Matter | Damage taken after Energy Shield is paid from mana first, 2 mana per point | You have no Energy Shield |
Keystones marked not yet in the game do nothing yet. Some pairs exclude each other, such as Bulwark Stance with Evasive Instinct, and Mind over Matter with Blood Magic.
Items. A few uniques grant a keystone without using a tree slot; wear only one at a time (Unique items).
Related: Mana before life.