Celtics fan here. Just curious from the perspective of a Magic fan, what would it take to for you to be happy with trading Dwight Howard to Boston?

In addition to the draft picks they own, they also are owed:

2012 first round draft pick from L.A. Clippers
The Los Angeles Clippers' own 2012 first round draft pick to Boston via Oklahoma City (top 10 protected in the 2012 draft, top 10 protected in 2013, top 10 protected in 2014, top 10 protected in 2015 and unprotected in the 2016 Draft). In addition, if the Los Angeles Clippers are required to send their 2012 first round pick pursuant to the above and are also entitled to receive Minnesota's own 2012 first round draft, then Boston via Oklahoma City shall receive the lesser of the Los Angeles Clippers' own 2012 first round pick and Minnesota's own 2012 first round pick. [L.A. Clippers -Oklahoma City, 6/24/2010 and then Boston - Oklahoma City, 2/24/2011]

2012 second round draft pick from Milwaukee
Milwaukee's own 2012 2nd round pick to Boston (top 44 protected in the 2012 Draft). If Milwaukee's own 2012 2nd round pick is in the top 44 picks, then Milwaukee's obligations to Boston shall be extinguished. [Boston - Milwaukee, 12/9/2011]

2013 second round draft pick from Minnesota
Minnesota's own 2013 2nd round pick to Boston via Cleveland. [Cleveland - Minnesota, 7/26/2010, and then Boston - Cleveland 2/24/2011]

2014 second round draft pick from New Jersey
New Jersey's own 2014 2nd round pick to Boston. [Boston - New Jersey, 6/23/2011]

2015 second round draft pick from Sacramento
Sacramento's own 2015 2nd round pick to Boston (top 55 protected in the 2015 Draft). If Sacramento's own 2015 2nd round pick is in the top 55 picks, then Sacramento's obligations to Boston shall be extinguished. [Boston - Sacramento, 2/17/2009]

2017 second round draft pick from Sacramento
Sacramento's own 2017 2nd round pick to Boston (top 55 protected in the 2017 Draft). If Sacramento's own 2017 2nd round pick is in the top 55 picks, then Sacramento's obligations to Boston shall be extinguished. [Boston - Sacramento, 2/24/2011]