Kylox's Voltstrider

Collect evidence 6: Kylox's Voltstrider becomes
an artifact creature until end of turn.
Whenever Kylox's Voltstrider attacks, you may
cast an instant or sorcery spell from among cards
exiled with it. If that spell would be put into a
graveyard, put it on the bottom of its owner's
library instead.
Crew 2, Kylox's Voltstrider can be your
commander.