mtg whenever a card leaves your graveyard Thran Vigil Whenever one or more creature cards leave your graveyard Leaves the Graveyard Matters :

Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Unnatural Growth: If an effect instructs you to "double" a creature's power, that creature gets +X/+0, where X is its power as that effect begins to apply

Usually, I try to come up with something new and clever

Paired with Boomerang Basics, this little guy has turned into one of the fastest engines in the format

Honda, Sumo Champion's first ability, assigning combat damage equal to the creature's toughness rather than its power, is something we've seen done before and better on Doran, the Siege Tower