That gives Ulrich both his ETB ability and his transform ability back to back, which gives you a 10/10 fighting Werewolf
If a spell or ability causes you to put cards into your hand without specifically using the word "draw," Fists of Flame's effect doesn't count them
Its not an obscene powerhouse, but it provides those big, weird moments that make Commander a great format
Playing enchantments that dont do anything the turn they enter always has risks, but its pretty easy to sequence this into a turn where you play something like Birds of Paradise or Paradise Druid to get a card straight away
But as a brewer, the option to play hidden gems like Aggressive Mining, Devastating Dreams, and Squandered Resources without losing card advantage made Windgrace very promising to me
If you don't want the Warriors to show up, don't attack with the mobilizing creature