Whenever you cast a noncreature spell, up to one target creature you control becomes a Shaman in addition to its other types until end of turn.
Whenever a Shaman deals combat damage to a player or planeswalker, add
or
. Mana added this way don’t empty as phases end.
Don’t time to copy correct wording for second ability, but it’d be worded like that green aura from Betrayers of Kamigawa