Poisoned Lotus 2

Poisoned Lotus enters the battlefield with
{x} petal counters. {x} cannot be equal to 0.
At the end of each phase, if there no petal
counters on Poisoned Lotus, exile it.
{0}: Remove a petal counter, add one mana
of any color.
{1}: Remove a petal counter, target creature gets
-1/-1 until end of turn.
{2}: Add a petal counter to Poisoned Lotus.