Ancestor’s Strength 2014
1st-level transmutation
Choose a willing creature you can see and touch. Its muscles bulge and become invigorated. For the duration, the target is considered one size category larger for determining its carrying capacity, the maximum weight it can lift, push, or pull, and its ability to break objects. It also has advantage on Strength checks.
Source: Deep Magic for 5th Edition (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details