Practically any effect that creates a token copy of something can be manipulated with this effect, including cards like Flameshadow Conjuring and Delina, Wild Mage
You can do this at instant speed, letting you sneak some damage through your opponents who might not be paying attention to your open mana, and very likely, not to the abilities you have tacked on those lands
More people need to play with this thing to see how truly broken it is
While this Golgari commander gives you access to black's excellent removal spells, you may want to run some punch or bite green removal spells to have your spiders deal damage without engaging in combat
Since their introduction in 2007, Wizards of the Coast has created a lot of planeswalkers, but only a small portion of them are worth playing
Cinderella Knight in Training is actually given out as a League sign-up promo