Moving by any means provides 5 charges for every 100 in-game units (approximately 1 Teemo diameter) traveled. This includes walking, using dash or blink abilities like Tristana'sRocket Jump or Flash, or casting Recall or being pulled or knocked back.
The damage dealt by Runic Echoes will apply spell effects from items as an area of effect ability.
Note that Runic Echoes does not affect the classification of the triggering ability - a single-target ability, such as Blinding Dart, is still treated a single-target ability for applying its own spell effects.
Runic Echoes will not apply champion-specific spell effects, such as Blaze, nor duplicate the effects of a champion ability (e.g. Blinding Dart will not blind all enemies hit and Baleful Strike will not generate AP for every enemy hit).
With large scale AoE effects, the item will pick a main target based on the pick order.
Basic attacks under the following conditions will trigger Runic Echoes's damage, as they are considered spells that cause ability damage:
Unique Passive – Echo: Moving and casting generates charges, up to 100. At 100 charges, the next instance of ability damage you deal will expend all charges to deal 80 (+ 10% AP) bonus magic damage to the first enemy hit and summon up to 3 lesser bolts that target nearby enemies, prioritizing enemies damaged by the ability and champions over minions.
Echo deals 「 250% 」「 200 (+ 25% AP) 」 damage to large monsters. Hitting a large monster with this effect will restore 18% of your missing mana.