Y'know what we need? Cross-promotional Skins

genius

Mundo Draven unique feature: Draven's Q gains Mundo's Q effect of refunding part of it's hp cost when it lands, doubled on killing blows, refunding 40% and 80% of the hp cost of his spinning axes. Refunding a total of 0 hp per hit

Draven Mundo instead gains a stack of Adoration every time he last hits something and loses 75% of them on death. Unfortunately, he doesn't have any passives that actually interact with these stacks.