Mythic everlasting pufferfish

When Mythic everlasting pufferfish enters the battlefield, put X leveling counters on Mythic everlasting pufferfish.
{t}: Target creature gets +X/+X until end of turn.
{t}: Create X LE tokens.
Whilst on the battlefield, X is equal to the
amount of leveling counters on
Mythic everlasting pufferfish.