Omniknight counter?

I've been a dota player for a long, long time, and there is no hero that bothers me as much as Omniknight. In almost every IH game, I will ban him for that reason. His heal is pretty batshit crazy in both damage and heal. Repel is more than a free BKB. Degen aura slows way too much, and if that wasn't enough, about a year ago Icefrog changed it so that it cuts your attack speed to 68%. His ult makes the entire team immune to physical hits, and in a team fight, you can repel your carry, making him essentially impossible to kill. I can't think of any hero that counters Omniknight. Anyone got fresh ideas?