Improvised spells are based on the mage’s enlightened will and knowledge of the Mysteries. A mage can cast improvised spells by dint of her Path; she needs no training from other mages (although training certainly helps!).
Improvised spellcasting uses a pool of Gnosis + Arcana.
Any spell listed in the Arcanum descriptions can be cast as an improvised spell, provided a mage has the proper Arcanum dots. No additional experience point expenditure is required.
Improvised spells can be cast silently and secretly, without the use of Rote Mudras.
Improvised spells require an extra Mana surcharge on non-Ruling spells.
Improvised spells leave a more easily Scrutinized resonance, requiring only a single success to learn the caster's identifying resonance (Identification)[1].
Spells and Rotes can be selectively filtered on the Spells drilldown page.
Spells By Proficiency