I am advising a pre-revenue startup. Can you direct me to a good template of a legal agreement for Advisory Warrants convertible into preferred equity?
It's not very good advice to recommend a template for legal documents. Sure it can be a starting place, but anything important enough to be written by a lawyer in the first place should probably be reviewed by a lawyer before it's put into use. At that point, it's going to take nearly as much time to use the "template" your attorney already has, as it is to find one some random person offered.
Sure, a sample agreement can highlight some of the areas that may be of concern to you, but it won't be comprehensive. The conversation with your actual attorney is of more value because they can ask the questions that drive your desire to cover specific circumstances and make sure the agreement is inclusive of those elements.