Dusk and Dawn

Stats

Values as the League of Legends Wiki's item data lists them, for every mode; the data doesn't state their units.

Effects

• Spellblade (unique): After using an ability, your next basic attack within 10 seconds deals 75% base AD (+ 10% AP) bonus magic damage and heals you for 10% AP (+ 3% bonus health) on-hit, and applies on-hit effects to the target again after a 0.2-second delay (1.5 second cooldown, starts after using the empowered attack).³

• Dusk and Dawn can provide sustain for AP Xin Zhao, especially against teams with little crowd control.⁴
• Dusk and Dawn is recommended with Ethereal Weapon Kai'Sa; the build can let a single W hit trigger her passive and lower its cooldown by half.⁵
• A Xin Zhao build can use Dusk and Dawn, Sword of Blossoming Dawn and Echoes of Helia; Fan the Hammer brings the build to full power, though other on-hit augments work as well.⁶

• With Ethereal Weapon and Fan the Hammer, Gwen's Q can snip seven times with Dusk and Dawn.⁷

Earlier formats

• Dusk and Dawn can apply two stacks; with Ethereal Weapon, Tahm Kench can apply three stacks of his passive with one Q.⁸⁹ 8x2 duos
• With Ethereal Weapon, Kai'Sa's W can trigger her plasma stacks on its own with Dusk and Dawn.¹⁰ 8x2 duos
• Dusk and Dawn can work well on Ekko; his E can immediately trigger his passive.¹¹¹² 8x2 duos
• With Ethereal Weapon, Blitzcrank's E can trigger his R, which triggers Ethereal Weapon again in a loop with Dusk and Dawn.¹³ 8x2 duos
• Ethereal Weapon and Dusk and Dawn do not interact with Shyvana's Q; Ethereal Weapon can still work well with her built-in on-hit passive.¹⁴ 8x2 duos
• With Moonflair Spellblade, Dusk and Dawn procced on Jax even though its Spellblade damage did not display; another comment from the same date said Spellblade did not proc.¹⁵¹⁶ 8x2 duos
• Ethereal Weapon made Dusk and Dawn apply two additional on-hits, for three on-hits total.¹⁷ 8x2 duos
• Dusk and Dawn applied two stacks of Vayne's passive with Ethereal Weapon.¹⁸ 8x2 duos
• With Ethereal Weapon, Kai'Sa's W could trigger her passive with Dusk and Dawn.¹⁹ 8x2 duos
• Dusk and Dawn's cooldown indicator and damage counter do not track information, although the item works.²⁰ 8x2 duos
• Dusk and Dawn's Spellblade did not proc on Jax in some cases.¹⁶ 8x2 duos
• Dusk and Dawn and Sword of Blossoming Dawn did not work.²¹ 8x2 duos
• Dusk and Dawn can provide a spellblade passive for Shyvana.²² 8x2 duos