mtg card guide Karmic - Urza's Legacy #11 (English) How to Play | Magic:

16 Toxrill, The Corrosive A Serious Threat With Little Escape Printed in Innistrad: Crimson Vow alongside Umbris, while Toxrill, the Corrosive may cost a hefty seven mana, once cast it is capable of single-handedly taking over a Commander game

I think the stock list does a good job of making sure we can trigger Nymris basically at will, and while that is fine and the deck plays a lot like the kind of deck I like to play in those colors, I really like the idea of using my graveyard as a second hand

He wished for knowledge, but not for the will to apply it

But the latter of these was a surprisingly big hit with the group, with many players paying as much attention to the tokens I brought as to the actual cards in their decks