Create Major Paradox

This spell changes a single important event in the caster's past. This is just like the spell paradox, but the event can be up to one year past.

Such an event could be acquiring proficiency in smithing tools rather than tinkers tools. Or deciding to research a new spell rather than create a new magical item. The event must be one the caster had control of at the time, and something should always be given up. The change should always be evident but not necessarily work the way the caster hopes. 

The DM should also feel free to remove any items or relationships he feels would not have been found as a result of the caster's meddling. After all, the things that are changed likely were important to the caster at one time.