the Mechanized MenaceFighter Mage
Rumble is a young inventor with a temper. Using nothing more than his own two hands and a heap of scrap, the feisty yordle constructed a colossal mech suit outfitted with an arsenal of electrified harpoons and incendiary rockets. Though others may scoff and sneer at his junkyard creations, Rumble doesn't mind—after all, he's the one with the flamespitter.
Junkyard Titan (RumbleP)
Every spell Rumble casts gives him Heat. When he reaches 50% Heat he reaches Danger Zone, granting all his basic abilities bonus effects. When he reaches 100% Heat, he starts Overheating, granting his basic attacks bonus damage, but making him unable to cast spells for a few seconds.
Rumble torches opponents in front of him, dealing magic damage in a cone for 3 seconds. While in Danger Zone this damage is increased.
Scrap Shield (RumbleW)
Rumble pulls up a shield, protecting him from damage and granting him a quick burst of speed. While in Danger Zone, the shield strength and speed bonus is increased.
Electro Harpoon (RumbleE)
Rumble launches a harpoon, electrocuting his target with magic damage and slowing their Movement Speed. Rumble can carry 2 harpoons at a time. While in Danger Zone the damage and slow percentage is increased.
The Equalizer (RumbleR)
Rumble fires off a group of rockets, creating a wall of flames that damages and slows enemies.
Rumble's ultimate can deal a lot of damage if you stay inside the area of effect. When you see the missiles falling, move out of the way as quickly as possible.
Rumble deals almost entirely magic damage. Build some Magic Resistance to reduce his damage.
Watch Rumble's Heat bar carefully. If you see him Overheat, go in for the kill while his skills are disabled.