Sian, the Song of Steel

Aura and Vehicle spells you cast cost {1} less to
cast.
Whenever Sian, the Song of Steel crews a Vehicle
for the first time each turn, for each Aura
attached to Sian, create a token that is a copy of
that Aura and attach it to that Vehicle. Exile
those tokens at the end of turn.
"The machines whisper in words only I can hear. I
make those words heard to all."