Atoseta's Mystic Reflection

Partner with Atoseta's Verdant Reflection
If you would lose unspent mana during your
turn, remove all charge counters from Atoseta's
Mystic Reflection, then put a charge counter on
it for each unspent blue mana you have. Then if
it isn't your end step, that mana becomes blue
instead. Otherwise, you lose that mana.
Atoseta's Mystic Reflection gets +1/+1 for each
charge counter on it.