The only guide you need to play Juggernaut and its Ultimate Omnilash

Juggernaut is one of the dangerous heroes in Dota because of is dreadfull Ultimate, Omnislash and his  very naughty little secondary spell, Blade Fury. Here are some more info about Juggernauts spells :

• Blade Fury- Juggernaut swings his sword like a tornado damaging nearby enemies and making him immune to magic. Blade Fury is a must get spell for Juggernaut. Reason is because it will get you out of sticky situations and it will get you "First Blood" fairly easily.
• Healing Ward- Juggernaut places down an ancient ward healing nearby allies. The Healing Ward spell will most likely save you and most of your team in some situations. All you got to do is just place the ward when you and your team enters a battle and then the magic will happen.
• Blade Dance- This spell gives Juggernaut a chance on every attack to do a critical strike. If you have luck on your side, then you are going to love this spell. It's awesome to have whenever you are PvP a enemy hero. Gives you a lot of extra damage if you do get a critical strike and in some cases it might get you some sexy hero kills.
• OMNISLASH- The name says it all. Juggernauts leaps towards the targeted enemy and then slashes him with his sword. Bouncing around if there are other enemies in range. One evil spell to use if you find a stranded little enemy hero wondering in your jungle or in the river. Note when you activate the spell and there are other enemy heroes or creeps ( even the creeps in the bush/jungle)  Juggernaut will most likely bounce to them to.