If, at that time, the creature is tapped, is affected by a spell or ability that says it can't block, or no creatures are attacking that player, a planeswalker controlled by that player, or a battle that player protects, then it doesn't block
Diminishing Returns Its been many years since people ran Diminishing Returns in any real tournament format, but you didnt think I was going to leave Forgetful Fish off the list, did you
Whenever you cast an instant or sorcery, you create a token copy of Stormsplitter that is exiled at the beginning of the next end step
Broodmate Dragon [Dragon]: Wait a minute, it's a six drop 4/4 flyer in commander, and I get another one for free when it enters the battlefield
While the previous Atraxa was definitely a nightmare, Atraxa, Grand Unifier is on another level