Speech of Beast and Leaf, which grants them the ability to perform constrained interaction with crops and beasts. They are able to realize the Firbolg’s words, though the Firbolg can’t fully grasp them in return. Any attempt to influence beasts and plants grant the Firbolg an Advantage to CHA checks. https://eduardojculc.anchor-blog.com/8262544/the-smart-trick-of-what-book-is-aasimar-in-5e-that-no-one-is-discussing