Unholy Toothbrush Collection

Unholy Toothbrush Collection enters the battlefield with 2 toothbrush counters on it.
Whenever another artifact enters the battlefield,
put a toothbrush counter on Unholy Toothbrush Collection.
{t} Remove a toothbrush counter from Unholy Toothbrush Collection: Put X -1/-1 counters on
target creature where X is the number of
toothbrush counters on Unholy Toothbrush Collection.