Dargo, the Shipwrecker Dargo, the Shipwrecker has silly synergy depending on which partner commander you choose
Cheap extra combats are always worth a look, and a three mana option that untapped all of your creatures and not just the one like Seize the Day is one Im interested in
III Target creature you control with the greatest power gains flying, first strike, and lifelink until end of turn
Black can play a bunch of synergistic artifacts, and MDFCs like Malakir Rebirth to boot
Depending on your budget, size of your collection, and value of your cards, you can start with a convenient option like a D-Ring binder, and work your way up from there
2 Voja, Jaws Of The Conclave Make The Most Of Your Elves Despite being a Wolf, Voja, Jaws of the Conclave quickly became a top-tier Elf commander thanks to its abilities