The thought of blood draining from your enemy is all that fills your mind. Anger surges through your veins, while your enemy stares; you stare right through them. Then only in a matter of seconds, you appear right where your enemy was standing and with a corpse right beside you.

When you use Wrath:

You have increased AC which is your Str + Con + Dex + Current AC. Your speed has increased by 15. You can ram any target that is at least 30 feet away from you, that is in your range of movement, the target gets knocked prone. You can roll another dice for more damage.

Balancing

If your DM allows it, you might encounter this before level 21. Here are some balancing options you can choose:

1. After you use this ability you pass out
2. You lose control of your character
3. You take more damage
4. You can no longer rage after this ability is used until a long rest
5. You take constant damage while this ability is in use
6. You become slower after use and during use until you are healed in some way, short resting does count 
7. You cannot sleep until a full day has passed
8. Healing doesn’t work on you until a long rest you can not heal during a long rest
9. You fall dead, you can make death throws
10. After you use ability intentionally it may happen again after a rage, only really works if you have two or more debuffs except number 4