Katas, the Great Destroyer

Katas, the Great Destroyer enters the battlefield
with {x} times 3 amount of +1/+1 counters on it.
Whenever a spell/ability is cast/activated or
resolves, a permanent enters/leaves the
battlefield, a player gains life/dealt damage, or
Katas, the Great Destroyer deals/dealt damage,
put a +1/+1 counter on Katas, the Great
Destroyer.
{1} put 2 +1/+1 counters on Katas, the Great
Destroyer, you may remove all -1/-1
counters on it.