Strange Seed

The Strange Seed is located at the portal in Stormwind City (on the Elwynn Forest map) to the Everbloom as part of the It's a Waist of Time secret.

Sadness, Keynoted -> Sky, Stone and Seed

The solution for this one was somewhat unclear, and players ended up brute-forcing the solution. "Sky, Stone, and Seed" was the answer to the anagram in all languages, but common thinking is that sky refers to the arakkoa, the seed to the botani, and the stone to the ogres (based on the fact that they are referred to in the first chapter as Children of Stone).

There's a Tiny Frog sitting on a rock at underwater in a river in Skettis on Spires of Arak.