Oak's Raise Dead Ward cannot be killed. This is retarded. Oak can just put up 4 wards by my tower and then go to another lane, while the invincible wards continue to spawn an endless supply of spirits. Once you get fully upgraded ward, with the 75% conversion chance, it is almost self-sustaining. Add in normal creep combat nearby and wards become totally overpowered pushing machines. Plus, spirits don't grant any gold or XP to the enemy team, so they get no benefit out of staying to defend their towers from the spirits.
If this is intended behavior, then why does the ward have 300 HP?
