Dragon Egg

{1}: Put a Growth counter of the mana color used to activate this ability on Dragon Egg. ({w},{u},{b},{r},{g},or{c})

At the beginning of your upkeep, if Dragon Egg has five Growth counters of one color on it, destroy it
and create a legendary (Color) Hatchling dragon creature token of that color. Do not apply commander tax.

If a Dragon creature token you control is returned to its owner's hand, put five Growth counters of that Dragon's color on Dragon Egg.

Dragon Egg can be your commander and is