What you were expecting to happen, and what actually happened?
Exploding Gems doesn’t seem to trigger with anything else. Currently possible combinations of the spell are:
Lose 4 Attack
Deal 5 Damage to all enemies --Also not actually possible in the end.
Lose 4 Attack/Extra Turn ------Need to double check this one actually. --Yeah this was wrong. My bad.
Deal 5 Damage to all enemies/Extra Turn
Explode 6 Gems
What are the steps to make it happen again?
Use Nobend Brothers Spell
Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
Hard to capture in a Screenshot, sorry