Barog the Destruction

When Barog the Destruction comes into play,
put a prey counter on X number of creatures.
When Barog the Destruction is involved in
combat, creatures with prey counters are -2/-2.
When Barog the Destruction does damage to a creature with a prey counter on it, put a +2/+2 counter on Barog the Destruction.
"Hey you, where do ya think yer going?"