Volatile Mutapod

If a counter would be put on Volatile Mutapod,
instead choose two at random that haven't
already been chosen from among +1/+1, flying,
deathtouch, reach, trample, and vigilance, and
put those counters on it instead. This ability
triggers only once each turn.
"Specimen 47 exhibited increased heart rate,
aggressive homicidal urges, and the power of flight.
In other words, total success!"
—Simic research notes