It is needed to be known that concepts cost sanity, this is especially so for Abstract, Sub-Vague and Vague marks as a single concept could have limitless potential, therefore most vague have one concept, the more powerful or potent the concept the harder it is to form it.
Concepts have limited time to be formed accordingly to the mark rank.
Solidified (5 hours)
Described (2 hours)
Abstract (1 hour)
Vague (45 minutes)
Forming a concept needs at least a bit of understanding of said concept.
For Example, when forming the concept 'moving water' one can't simply think the word and form the concept, one needs to go into greater detail whilst seeing if it clashes wrongly with the mark description or not.
'The Ability to Move any source of water in any form with thoughts' would be an Okay example, here the restriction was that one can only move water and not create or preserve it, so you can instead...
'the ability to move water through space and tangible objects or time, all while preserving the water' this would be a more powerful form of 'moving water' concept and cost more sanity, So it would be wise to disregard space and time.
Concepts are formed as some marks can have too many abilities, therefore concepts are formed to anchor the mark to a specific capability, if one has the ability to control substances they would need to anchor in by choosing a concept regarding it, like 'Controlling gases', 'Controlling drugs' or 'Controlling informatory substances' this is precisely why one needs to anchor in on a concept before the timer runs out, if they don't then they might go insane or lose the chance to have any power. (Concepts can be formed at the milestones of ages so one can have severao chances to form concepts)