Sorry I forgot this... Ragnaros would have a special mount called "Submerge", which is like Abathur's Deep Tunnel.

by Kobold101: "This sounds like it might be a tad OP, but it does seem rather interesting. I've always liked minion based Heroes." To make Kel'Thuzzad more minion based, his passive could be "Whenever a minion dies around Kel'Thuzzad, summon a Skeleton. Whenever a Hero dies around Kel'Thuzzad, summon an Abomination. Whenever a building is destroyed around Kel'Thuzzad, summon a Necropolis. All the Necropolis would do is spawn a Skeleton every 4 seconds.