Kelzaral herself has two abilities. Kinetic Push does magic damage, knockback (not up in the air, just straight back), and slows. Lightning Strike just does magic damage.
She'll also periodically summon pike geists (four 64even, linked).
The various geists have a few abilities. Slice does melee damage and decreases mitigation vs physical. Deep Cut and Whirling Slice both do initial melee damage and then extra melee damage per tick.