Inviting potion

When this artifact enters the battlefield put 3
charge counters on it.
{2}, {t}, remove a charge counter from this
artifact: Shrink (this creature's power and/or
toughness become 1 if they are greater than 1) or
Grow (this creature's power and/or toughness become
4 if they are less than 4.) target creature.
However, this bottle was not marked "poison," so
Alice ventured to taste it.