For four mana, you can tutor up the Vampire and immediately sacrifice it to defeat the battle and add an 8/8 Zilortha to the battlefield
It's worth noting that, just because a card has the Companion ability, doesn't mean it can't be played as a regular creature in your deck, or indeed as your commander
You can hold up mana to bounce something, and if there's nothing significant enough, you can just cast the creature portion on the opposing end step
Power Fist gives it more +1/+1 counters, Two-Handed Axe will double Wolverine's power, and Brotherhood Regalia makes Wolverine unblockable and protection with ward two
The Abzan, a white-black-green faction, was centered in white rather than black