Cursed Wombat
[Modern Horizons 3]

2BG: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)

Permanents you control have "Whenever one or more +1/+1 counters are put on this permanent, put an additional +1/+1 counter on it. This ability triggers only once each turn."