Baby Chromatic Dragon

Chromatic Light. The baby Chromatic Dragon can store this elemental energy outside of combat for up to 1 hour at a time. During that time, the Chromatic Baby Dragon emits dim light for 15 feet colored like the absorbed energy for 1 hour. During this time, the Chromatic Baby Dragon has disadvantage to Stealth checks involving sight.

Lively Aftertaste. If the baby Chromatic Dragon absorbs healing energy, the energy lasts for up to two uses.

Tooth and Claw. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 2) slashing or piercing damage.

Chromatic Breath (Recharge 5-6, or if consumed energy). The baby Chromatic Dragon exhales fire in a 10-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 10 (2d8) of elemental damage on a failed save, or half as much damage on a successful one.
If the baby Chromatic Dragon has absorbed an element, then the damage of the breath weapon is the same as what the baby Chromatic Dragon has absorbed.
If the baby Chromatic Dragon has absorbed healing energy, then the breath weapon heals all targets within the cone for 8 (2d6+2). 
If no elemental energy has been absorbed, then roll 1d6 for the randomized elemental damage type (roll a d6: 1-fire, 2-cold, 3-lightning, 4-acid, 5-poison, 6-force).

Regurgitate. This action may only occur after the Baby Chromatic Dragon has absorbed an element. The baby Chromatic Dragon spits up elementally-charged goop onto a proffered weapon. That weapon gains 1d6 of that elemental damage type.
This can be done multiple times to the same weapon.

Curious, Elemental Hunger. As a reaction, the baby Chromatic Dragon may dash to target ally and grant Resistance to an elemental damage of its choice. Doing so fills the baby Chromatic Dragon with elemental power, including radiant or necrotic. The energy can then be used to enable Chromatic Breath or Regurgitate.  

Hand That Feeds. Whenever a spell from a friendly target hits the baby Chromatic Dragon with elemental damage or healing, the baby Chromatic dragon may choose to instead to completely absorb the energy and become immune to that damage type. This energy can then be used to enable either Chromatic Breath or Regurgitate.

The baby Chromatic Dragon cannot use either reaction again until the energy contained has been expended.