Rammus
the Armordillo
Rammus accelerates in a ball towards his enemies, dealing damage and slowing targets affected by the impact.
Cooldown: 16/13.5/11/8.5/6
Range: 300
Rammus goes into a defensive formation, vastly increasing his Armor and Magic Resistance, amplifying Spiked Shells' damage, and returning damage to enemies that basic attack him, but he is also slowed during this time.
Cooldown: 6
Range: 300
Rammus taunts an enemy champion or monster into a reckless assault against him. Additionally, he gains increased Attack Speed for a short time, but this bonus is extended by having any of his other spells active.
Cooldown: 12
Range: 325
Rammus hops into the air and slams down at a target area, dealing magic damage and slowing enemies. If cast while Rammus is in Powerball, Rammus knocks up enemies near the center as well.
Cooldown: 110/95/80
Range: 25000
Powerball can be used as an effective escape mechanism.
Using taunt on a champion by your tower can cause the tower to attack your enemy.
Tremors and Defensive Ball Curl can be used late in the game to obliterate towers. If you're bogged down in a team fight, it is often valuable to break off and attack the buildings.
Pay particular attention to when his Defensive Ball Curl is off. Rammus has much lower stats than a normal tank when he's out of the stance.
Rammus often stacks high Armor, leaving him especially vulnerable to caster damage while not in Defensive Ball Curl.