P / Triumphant Roar
Alistar charges his roar by stunning or displacing enemy champions or when nearby enemies die. When fully charged he heals himself all nearby allied champions.

the Dark Child
Dangerous, yet disarmingly precocious, Annie is a child mage with immense pyromantic power. Even in the shadows of the mountains north of Noxus, she is a magical outlier. Her natural affinity for fire manifested early in life through unpredictable...
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Alistar charges his roar by stunning or displacing enemy champions or when nearby enemies die. When fully charged he heals himself all nearby allied champions.
Alistar smashes the ground, dealing damage to nearby enemies and tossing them into the air.
Alistar rams a target with his head, dealing damage and knocking the target back.
Alistar tramples nearby enemy units, ignoring unit collision and gaining stacks if he damages an enemy champion. At full stacks Alistar's next basic attack against an enemy champion deals additional magic damage and stuns them.
Alistar lets out a wild roar, removing all crowd control effects on himself, and reducing incoming physical and magical damage for the duration.
Ability references are available for every opponent. Matchup advice covers 1 pairings; the rest are unrated.