Soft Variant, will lead to lots of overcasting

When a caster casts a spell more than once per day or is out of Mana, they can cast (again) by making overcast checks as outlined in M&M, but they also roll an Overcast die, which works like a usage die.

Overcast dice recover one step every time you regain Mana.

Optional: Overcast dice have to be purple. Skip steps for dice when you do not have a purple die of the proper size.

Gritty Variant, will give Casters an Edge, but they may die

When Casters want to cast more than the allowed limit (a spell more often than once, or when they are out of Mana), they can make overcast checks as outlined in M&M, but they also take attribute damage equal to the rolls (on each WIS for their WIS check and UV Factor for their UV Factor check). They can offset this damage by choosing from the YOUR WISDOM FAILED YOU table below (crossing out any results already taken) or WISDOM and the KARMIC BACKLASH table below (crossing out any results already taken).

A full week of rest allows the caster to recover ONE slot of either table, but the referee is advised to write in a new result. If all results are crossed off the table, no overcasting is possible without taking attribute damage. Good luck!