[Gameplay] Sejuani's winter's wrath counts as two spells for spell registering effects

and

On a sidenote, it can also push all minions and monsters - even while being teleported to, as well as the Rift Herald once it has been summoned in a lane.

STEPS TO REPRODUCE: Pick Sejuani. Buy Spell stacking item OR play against Maokai - watch as Sejuani's W counts as two spells, not one.