Hallia, Avatar of the Storm

Flying
Magecraft — Whenever you cast or copy an
instant or sorcery spell, Hallia, Avatar of the
Storm gets +1/+1 until end of turn and deals 1
damage to any target.
Whenever Hallia attacks, instant and sorcery
spells you cast this turn have storm. (Copy them
for each other spell cast before them this turn. You
may choose new targets for the copies.)