Kog'Maw's W dealing TRUE damage instead of MAGIC damage
At first I thought maybe it was a bug on the death report. Every time Kog'Maw killed me it said he was doing true damage from his Bioarcane Barrage, but as you can see from his damage dealt to champions he did over 7k true damage to champions that game compare that to vayne (who I yield was bad) only dealing 1.5k true damage or my shyvana dealing 1k true damage.
Definitely busted if this interaction is with more than just Shyvana.