Ulrich of the Krallenhorde 3RG Legendary Creature Human Werewolf 4/4 Whenever this creature enters the battlefield or transforms into Ulrich of the Krallenhorde, target creature gets +4/+4 until end of turn
Reference Decks Improvised Masterpiece Izzet Maestro Green Explore Rare/Mythic Rare Cultivated Highland Guide40 Fecund Greenshell40 Lumra, Bellow of the Woods20 Common/Uncommon Stem-Knuckle Brawler(Unc)100 Crag-Plate Watcher(Unc)50 Thornguard Veteran(Unc)50 Leg-Shield Formation(Unc)100 Unmatched Reclamation(Unc)100 Hunter's Talent(Unc)100 Pile-On Harvest(Common)100 Quick Note A deck with Raccoons that gets a bonus for spending 4 or more mana on spells in a single turn (Accumulate)
The first is a fun enters-the-battlefield (ETB) ability to make a 1/1 dork, which is good for the size and in the color of token enablers like Doubling Season to push that around
It ETBs with energy, sure, but it can convert energy to creatures without tapping, which, of course, means you can generate infinite tokens pretty easily with the other cards here
The Compost may is useful, the black is situational