The dream may symbolize confronting something that appears intimidating or threatening, particularly where others feel vulnerable.
This picture suggests that through faith and trust in God, the perceived threat loses its power and is seen as far less overwhelming than initially believed.
Psalm 91 appearing in the dream may reflect the dreamer’s belief that God provides protection and stability when facing fearful situations.
I was thinking the same thing.
If I may be so bold to include that the black dragon that breaths fire is representative to one who is seen as one of a "a dark nature".
It could mean or dark as in opposed to the light or it could mean just simply unknown and secret.
Dragon represents the enemy.
In the context of your dream it would be fair to say it's one who speaks a message of fire and is considered an enemy.
The beams of green light are representative to your weapon against such a dragon you deem to be a danger or a threat you and your faith and family.
Green to my undestanding represents vegetation yet I'm not sure what that would mean but feel led to mention it.
Light describes the primary weapon against darkness and reveals what is hidden in the shadows/unknown.
The light hitting the chest is your weapon pointed at the heart of the dragon so as to reveal the motive behind any words from what you deem as a threat.
The light coming frome "both hands" leads me to mention it will take some effort on "your" part to correct and clear up any smoke derived from the fire.
The dragon morphing into a small toy represents to me that the dragon was not a threat at all yet it was necessary to test the spirit behind what the fire was all about.
God bless all of you!
boltupright.