Fitness Fanatic

Renown 1 (Whenever this creature deals combat damage to a player, if it isn't renowned, put 1 +1/+1 counter on it and it becomes renowned.)
{1}{g}: Fitness Fanatic gains vigorous until end of turn. (Its power and toughness can't be lowered. -1/-1 counters can't be placed on it; damage in the form of -1/-1 counters is marked normally instead. Damage from a source with deathtouch is not automatically lethal.)
{1}{g}{g}: Fitness Fanatic gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)