You may cast Brokkos, Apex of Forever from your graveyard using its mutate ability.
Really funny as voltron- or infect-commander. The combat damage dealed by the mutated creature count's as commander damage + because you can mutate him from the graveyard, he avoids commander tax most of the time. Small evasive creatures or cards like "Cold-Eyed Selkie" become a threat.
No T1 standard, but good for some suprises.