The Silver Dragon is a MYTHICAL pet that is obtainable from the Christmas Tree Egg and the Egg of Many Gifts (less than 0.01% chance of hatching). The Rainbow version of the Silver Dragon is also available in the Insane Christmas Egg with a 65% chance of hatching.
The latest Pet Simulator X value list for Silver Dragon can be found below:
💎 1,400,000 (1.4m)
💎 3,800,000 (3.8m)
💎 11,600,000 (11.6m)
💎 36,100,000 (36.1m)