Salizarr, Venusian Thaumaturge

Whenever you cast a spell from your hand
with converted mana cost lesser than or
equal to Salizarr's power, it gains cascade.
Whenever you cast a spell with converted
mana cost higher than Salizarr's power, put
a +1/+1 counter on Salizaar.
—DanWizardTheActualWizard