Nothing happens until you target the egg with your sacred flame spell. As the flame strikes the egg it explodes in a raging inferno of sacred fire. The fire reaches up into the sky and spreads to your right and left but luckily not towards you and you watch as as a bald eagle sized bird made of pure flame emerged from the inferno and flies straight towards you.
You watch as the light from the flame gets brighter and brighter until you are forced to close your eyes, while, simultaneously, the heat gets hotter and hotter. It's almost, but not quite painful. You raise your shield in one last, desperate defence.
In a flash the bright light instantly fades and the warm feeling slowly ebbs away. Yet, you still feel warm, as if sitting near a small campfire.
You open your eyes and immediately notice two things. First, the big, flaming bird has gone. Second, your shield is glowing. It is night but you can see your surroundings just as if you had cast a light cantrip on yourself.
You quickly remove your shield see that it now has a large red, orange and yellow phoenix symbol emblazed upon it.
OOC:
In game terms you have just acquired your new pet phoenix. While in your shield the phoenix grants you additional protection. Add +1 to your AC and you now have resistence to fire damage.
It also has the light spell cantrip cast permanently on it.
You are also always considerd warm and will not suffer damage or exhaustion from being exposed to the elements. Although, you will suffer cold damage from magical sources normally.
In addition, you may as an action attempt to summon the phoenix. Make a handle animal DC 12 check and on a success the phoenix will come out of your shield and aid you.
Acting on your initiative, you may have the phoenix either;
1. Aid you or an ally of your choice (gain advantage on attack rolls)
2. Blind an opponent (give disadvantage on attack rolls to a creature that relies on sight)
The Phoenix has a flight speed of 60 feet,
Ac 13
Hp 8
It can aid you for a maximum of one hour before it must return into your shield. Also, if its hps are reduced to 0 then it must also return to your shield. After either limitation has been reached you may not summon it again until after the next dawn.
At the moment, the phoenix is very young. You think that as it ages, its abilities can only get more powerful.