If you don't know all the crazy Melee-W/Dash-W interactions: for unknown reasons, specifically Melee-W stops working with slams if Illaoi has an active spellshield

This bug has existed since Patch 26.10, due to an undocumented change in Illaoi's script to silently kill Illaoi-W + Shiv interactions
Wiki Documentation: Patch V26.10-Video
(Volibear nuclear fusion is still in the game btw)

If you are interested in more funky W-interactions: here is a Google spreadsheet
If you are interested in more Illaoi shenanigans and bugs: here is an entire essay
(it's the longest post you will ever see in your life, I am not joking)
Examples: * Illaoi-E with 30% one-shots Yuumi at 100% HP * certain pre-apply bonus can cheat damage (yes, this is game breaking if anyone finds a viable application) * detailed explaination in the essay post at section 8