@Meddler, A question about item interactions with Gangplanks Barrels.

So they way I thought Gangplanks barrels interacted with items, is that they apply Physical sheen effects ( ) And benefitted from Crit chance (and passive ofc.) And that was it. I was looking for a cheesy/fun build to use on Gangplank, and I was looking at . Muramana's ''shock'' passive applies on Single target spells and attacks. I went to the LoL wiki and looked at GP E's tooltip. The way the damage is calculated:

If Gangplank scores the last hit,** the triggering attack** is splashed as physical damage to surrounding enemies, Slow icon slowing them for 2 seconds. Explosions ignore 40% of their targets' armor, and enemy champions take bonus physical damage.

So I started to think, does Muramana calculate it as an attack, or as an AoE spell? AFAIK, the Shock passive isn't an on hit passive, it applies on Single target spells and Attacks. I got kinda confused and took a look at the ''additional information'' on the wiki

Trial by Fire's damage will not be splashed. Critical strikes against a keg will splash critical damage. Physical Spellblade effects like Sheen or Trinity Force apply to keg's damage, while magical Spellblade effects like Lich Bane or Runeglaive don't apply to keg's damage. The latter also applies to not procing the magic damage passives of Kircheis Shard ,Statikk Shiv and Rapid Firecannon; Luden's Echo is the one exception (which cannot be proced by a normal shot by Parrrley).

So according to this, Magic damage on hit effects are not applied to Powder Kegs, but it doesn't say anything about Physical damage on hit effects... So my question is, Do powder kegs apply physical damage on hit effects like: ? I was honestly convinced they did not, but now I don't even know anymore :l (and if they don't, is Muramanas Shock passive considered an onhit effect?)