Spellweaving is the technique used to bring forth magical effects that require concentration in order for those effects to persist.
Journeyman Spellweaver
At 2nd level, you graduate from Apprentice to Journeyman Spellweaver, granting you the following featuires:
See Magic:You can use an Action to slip into the flow of mebhaighl. This feature functions like a Detect Magic ritual with the following modifications: the casting time for the ritual is reduced to one action, it has a one minute duration, and requires no concentration to maintain.
Spellweaving Savant: The gold and time you must spend copying spells into your spellbook are halved for spells that can be cast using the spellweaving technique.
Find Familiar: You may add the Find Familiar ritual to your spellbook. If you already have that spell in your spellbook, you may instead add your choice of any other 1st level spell on the Wizard’s Spell List. This does not count against the two additional spells normally gained when advancing a level as a wizard.
Summon Spellbook Familiar:When you perform the Find Familiar ritual, your spellbook becomes a Spellbook Familiar.
If it ever becomes necessary to replace your spellbook, you can do so by performing another Find Familiar ritual. You must have a blank book or a magical grimoire that you are already attuned to when you perform the ritual in order to house your familiar spirit. For this reason, many Spellweavers keep a spare spellbook with Find Familiar inscribed into it. Once your familiar spirit inhabits this new home, it brings with it all of the spells that were inscribed into your previous spellbook.
Spellweaving Adept
As of 6th level, you graduate from Journeyman to Spellweaving Adept, granting you the features:
Disrupt Spell: While your See Magic ability is in effect, you can use your Reaction and expend an unused spell slot to interrupt a creature who is casting a spell. The creature must be within 100’ of you and in your line of sight. Your attempt to interrupt automatically succeeds if the spell being cast by the target of this ability is equal to or lower than the level of the spell slot you expended. If the spell’s level is higher than the spell slot you expended, you must make an ability check using your spellcasting ability (the DC = 10 + the spell’s level). If you succeed, the spell fails and has no effect. You may use this ability a number of times equal to your spellcasting ability modifier. You regain all uses of this ability after a long rest.
Usurp Spell Also starting at 6th level, once per long rest, you can use one of your daily uses of your Disrupt Weave ability to usurp control of a spell that another creature is currently concentrating on. The spell in question must be on the Wizard’s Spell List must be of a level you are capable of casting. In order to attempt to usurp control, the opposing spellcaster must be in your line of sight and no more than 100’ away from you. If you succeed on an ability check using your spellcasting ability (vs a DC of 10 + the spell level you are attempting to usurp), you take control of the spell as if you had cast it.
Master Spellspellweaver
Starting at 10th level, you have become an acknowledged master of the art of Spellweaving. You gain the following features:
Arcane Insight While your See Magic ability is active, you gain advantage on any ability check you make that requires you to use your “spellcasting ability modifier.“
Improved Familiar: As your understanding of the arcane arts has been steadily increasing, so too has your familiar’s. As long as your Spellbook Familiar is within 10’ of you, on its turn, it can take an Action usurp control of a single spell you are currently concentrating on. Once your Spellbook Familiar uses this ability, it cannot do so again until after you take a long rest.
Relinquish Spell: If your Spellbook Familiar attempts to usurp a spell you are concentrating on, you must use your Reaction to relinquish control of the spell to your familiar, freeing you to concentrate on other spells. If you do not or can not use your reaction to use your Relinquish Spell feature, your familiar’s attempt to take control of the spell fails.
Grandmaster Spellweaver
As of 14th level, you finally understand the deepest secrets of your art. As a Grandmaster Spellweaver, you are now able to remove the "concentration" requirement from the duration of a spell that is 5th level or lower. Doing so reduces its duration to 50% of its listed maximum duration. Once you use this ability, you cannot do so again until after a long rest.