Board Thread:Questions and Answers/@comment-5336393-20200121044148/@comment-34669178-20200121051704

I don't think he was able to summon an Elemental Dragon, considering that the dragons are associated with their rider's Elemental Powers/Essence. Garmadon's Destruction was (at least I believe) dormant during the Tournament of Elements. I am not sure if he'd still be able to summon one in his current form (if he was able to do so.)