In a vacuum, just creating two tokens when your opponent attacks you with two creatures is a great start, especially when you have cards that care about spiders
Of course, I always draw it in my starting had, so theres that (this is actually true, as I did draw it in my starting hand each time I brought it in from the sideboard at GP Copenhagen 2015, the only tournament Ive played it in)
Training Grounds can reduce the part of an activation cost represented by generic mana symbols down to nothing, as long as it still costs at least one mana
not every card from the Commander Deck will make it to Arena, but every legendary creature of the Commander Deck will head there, and various bundles come with Mythic Turtles, special sleeves, and more
What I care about the most, however, is that he is a fun commander for Thopter kindred deckswhich is such a weird niche
Theyre tiny pieces of history