First, it ties card drawing to growth, because the creature gets a +1/+1 counter for each card drawn
That will depend on the board state, of course
(Only double-faced cards can be transformed.) Number 54 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Timeless, Vintage Not Legal Formats Alchemy, Pioneer, Standard Rulings (9/22/2011) Moonmist causes any double-faced Human to transform, not just Werewolves
This The Lost Caverns of Ixalan rendition of everyones favorite legendary Dino costs a staggering but retains its standard stats of 12/12 and trample
He provides built-in card draw and token replacement, which makes Zombie decks smoother, more resilient, and easier to pilot across casual and mid-power Commander tables