Mana Glutton

Mana Glutton enters the battlefield with X +1
awakening counters.
Mana Glutton's power and toughness are equal
to the number of lands you control.
Whenever a land enters the battlefield under
your control, add one mana of any color for
each awakening counter on Mana Glutton.
Until end of turn, you don't lose this mana as
steps and phases end.