Which elemental dragon grants a bonus to attack damage and ability power?

Which elemental dragon grants a bonus to attack damage and ability power? Infernal Drake does.

On Summoner’s Rift, defeating an Infernal Drake grants the team stacks of Infernal Might, an offensive buff that increases attack damage and ability power. That makes it especially valuable for teams built around marksmen, fighters, assassins, and ability-focused mages. The bonus is applied to champions on the team that secured the drake, not just to the jungler who dealt the final hit.

Infernal Drake is one of the elemental drakes introduced as part of League’s elemental-rift system. The elemental drake that determines the Rift’s terrain also determines which Dragon Soul can eventually be earned. Infernal Soul adds an area-of-effect explosion to periodic damaging attacks or abilities, so the drake’s reward has both a direct-stat component and a later team-wide payoff.

A common mix-up is confusing Infernal’s offensive reward with Mountain Drake’s defensive armor and magic-resistance bonus, Ocean Drake’s regeneration, or Cloud Drake’s ultimate cooldown benefit. The exact percentages have changed across patches, but Infernal Drake remains the canonical answer for the attack-damage-and-ability-power effect.