Flask of Cerulean Tears

Flask of Cerulean Tears enter the battlefield with
1 charge counter on it.
{t}: Gain {c} equal to the number of charge
counters on Flask of Cerulean Tears. You may
only use this mana to cast instants and sorceries.
Whenever a creature delft damage by a tarnished creature you control dies under an opponent's control, put 1 charge counter on Tear of
Cerulean Tears.