If you have any means to repeat this trigger, flicker, or bounce Black Cat, you're on the road to the best side of card advantage, while your poor opponent gets severely reduced card selection
When you attack with a flying creature, however, you get to transform that creature into a 4/4 Dragon creature that retains its other creature types for the turn
I often then never use it
I wish Gobbling Ooze started off as a 1/1 and cost something like 3 mana, because I like the other parts of this creature well enough
Chandras Incinerator The gift that keeps on giving A six-mana 6/6 is the standard rate
Of course, persist makes it a supercharged recursion outlet (for your opponents' stuff) and potential win condition in Celes or Gev, as long as graveyards have goodies in them