ice witch morgana
her W could be a kind of freezing ground
her ultimate slows so it could have some kind of chilling effect visual
and the stun on her ulti could be a visual kind of like
her Q look kind of like
ice block to trap thier feet when they are snared
and her joke could be like
she makes it snow then falls backwards into the snow and makes a snow angel with her wings instead of her arms and then gets up and looks at at and goes "i never understood this concept"