Rammus' basic attacks deal bonus magic damage, scaling with his Armor.
Rammus accelerates in a ball towards his enemies, dealing damage and slowing targets affected by the impact.
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.
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.
Rammus creates waves of destruction pulsing through the ground, causing damage to nearby enemies and slowing them. Turrets take double damage from Tremors.