The damage type that Leona deals is mostly Magic Damage.
Leona's damage type breakdowns as follows:
Damaging spells afflict enemies with Sunlight for 3.5 seconds. When allied Champions deal damage to those targets, they consume the Sunlight to deal 32 - 168 (levels 1 - 18) additional magic damage.
Next basic attack deals 10/35/60/85/110 (+30% bonus Ability Power) bonus magic damage and stuns for 1 second.
For 3 seconds, Leona reduces incoming damage by 8/12/16/20/24 and gains 20/25/30/35/40 (+20% of bonus Armor) bonus Armor and 20/25/30/35/40 (+20% of bonus Magic Resistance) Magic Resist. When the effect ends, nearby enemies struck take 55/90/125/160/195 (+40% bonus Ability Power) magic damage and Leona retains her bonus Armor and Magic Resist for 3 seconds.Damage reduction effect will not exceed 50% of incoming damage.
Strikes all enemies in a line dealing 50/90/130/170/210 (+40% bonus Ability Power) magic damage. The last enemy Champion struck will be rooted for 0.5 seconds and Leona will dash to them.
Calls down a radiant beam of solar energy dealing 100/175/250 (+80% bonus Ability Power) magic damage and slowing enemies by 80% for 1.75 seconds. Enemies in the center of the flare are stunned instead of slowed.
isn’t endorsed by Riot Games and doesn’t reflect the views or opinions of Riot Games or anyone officially involved in producing or managing League of Legends. League of Legends and Riot Games are trademarks or registered trademarks of Riot Games, Inc. League of Legends © Riot Games, Inc.