Ink

Simple, Complex or Unique.

Simple
Any artist regardless of mastery level can undertake any master level of a simple tatoo but the lower the Artists is compared to the Mark the higher the DC will be

Complex
Only an artists that matches or exceeds the Mastery level of the Magic mark can undertake it.

Body Location, Leg, Torso, Face etc

Can the Magic mark be expanded/ upgraded? what are the requierments.

Magic mark abilities that deal damage or have range will specifiy it.

The skill requirement for the artist to match. More skilled artists may charge ore for their work.