Here are the stats for each one Avatar
1: +30 dmg / +5 armor / +500 hp / 60 sec/Magic Immunity
2: +40 dmg / +10 armor / +750 hp / 65 sec/Magic Immunity
3: +50 dmg / +15 armor / +1000 hp / 70 sec/Magic Immunity
Metamorphosis
1 AoE number means full dmg area /SPLASH DAMAGE
2 AoE number means 50% dmg area / SPLASH DAMAGE
3 AoE number means 25% dmg area/ SPLASH DAMAGE
1: 50/150/250 AoE / -0.3 sec on base atk speed / +750 HP / 240 cool / 60 duration
2: 100/150/300 AoE / -0.5 sec on base atk speed / +1250 HP / 260 cool / 65 duration
3: 200/300/400 AoE / -0.7 sec on base atk speed / +1750 HP / 280 cool / 75 duration/Spell Immunity
I like metamorphosis better than avatar. I luv it with illidan.