Weave the Arcane
20% chance to Recover 10% of Mana when you use a Skill
6% reduced Damage Taken for 4 seconds after Spending a total of 200 Mana
Movement Skills cost no Mana
20% increased Attack and Cast Speed if you've used a Movement Skill Recently 
Weave the Arcane is a notable Ascendancy passive skill for the Trickster. It increases maximum mana, removes mana cost from skills with the Movement tag, grants increased attack speed and cast speed if you have used a Movement skill recently, grants a chance to recover a percentage of maximum mana on active skill use, and grants damage reduction after spending 200 mana.
Channelled skills: The modifier 20% chance to Recover 10% of Maximum Mana when you use a Skill only applies when one activates a channelled skill for the first time. It does not continue to grant mana recovery as one spends additional mana on channelled skills that are already activated. However, all mana spent during a channelled skill is counted towards Reduce damage taken by 6% if you have spent a total of 200 mana recently.
Mines: When a Movement skill is supported by a gem which turns it into a mine (such as Blastchain Mine Support), the mana cost of the skill is converted to Mana Reserved before hand. This means that skills Like Lightning Warp will still reserve mana based on the original cost of the skill. "Movement Skills cost no Mana" has no impact on skills which are converted to Mines.
Repeated skills: When a skill is repeated, such as when supported by Multistrike SupportMultistrike SupportAttack, Melee, Support
Mana Multiplier: 160%Requires Level 38Supports melee attack skills, making them repeat twice when used, targeting a random enemy each time. Cannot support Vaal skills, totem skills, channelling skills, or triggered skills.Per 1% Quality:
Supported Skills deal 0.5% increased Melee Physical DamageSupported Skills Repeat 2 additional times
Supported Skills have (35-44)% more Melee Attack Speed
First Repeat of Supported Skills deals 22% more Damage
Second Repeat of Supported Skills deals 44% more Damage
Supported Skills deal (20-10)% less Attack DamageThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket. or Spell Echo SupportSpell Echo SupportSpell, Support
Mana Multiplier: 140%Requires Level 38Supports spell skills, making them repeat when cast. Cannot support Vaal skills, totem skills, channelling skills, triggered skills, instant skills, or skills which reserve mana.Per 1% Quality:
Supported Skills deal 0.5% increased Spell DamageSupported Skills Repeat an additional time
Supported Skills have (51-70)% more Cast Speed
Supported Skills deal 10% less DamageThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket., the modifier 20% chance to Recover 10% of Maximum Mana when you use a Skill only applies once since the skill is only used once.
Blood magic: Any life spent by skills supported by Blood Magic does not count towards the total mana spent.