When using the Ozolith, I had a creature with multiple added evergreens, and then destroyed that creature. the Evergreens transferred to the Ozolith. At the beginning of combat on my turn, the evergreens were removed from the Ozolith but NOT added to my first creature. This happened multiple times.
Additionally, on three of the tests, the game soft locked either when the evergreens were being added to the Ozolith, or when they should be added to the first creature from the ozolith.