Diana vs Sion Counter Pick

Sion is an unusual mid lane opponent for Diana — his class tags read Tank and Fighter, and his kit is built around Decimating Smash’s charged knockup rather than the burst trades a mage lane normally revolves around. Across 223 games on patch 16.13.1, he wins 54.7%, leaving Diana at 45.3% and a Hard rating.

Glory in Death is the defining problem: after dying, Sion reanimates briefly with rapidly decaying health, rapid attacks, and healing, which means a clean kill from Diana’s Lunar Rush and Moonsilver Blade combo does not actually end the fight. Soul Furnace adds a shield plus a delayed area of magic damage, and every champion kill grows his max health permanently, so a Sion who survives the early skirmishes only gets more durable from there.

Unstoppable Onslaught also gives him a long-range initiation that ramps up speed the further he travels, closing the 150-versus-175 range gap that would otherwise favor Diana. Her Pale Cascade shield helps absorb the opening hit, but with Sion’s health effectively extended by his passive and his own 5 difficulty rating reflecting a kit that rewards simply landing the charged Q, this is one of the few matchups where Sion‘s durability outlasts her burst rather than the other way around.