They are handy in a discard deck because people often want you dead as soon as they realize your going to make them discard all the fun stuff they're holding up, protection type Stax can be very helpful in my experience
When my opponent pays 2 mana to cast your darts, and then two more mana to deal a single damage to me, I can't stop laughing
The Fire Crystal BPhillipYork: The red version of this cycle is probably the most abusable, and haste is a really important enabler so all around pretty solid card
Here's an example: Endlessly Falling 3U Enchantment Creature- Nightmare 3/3 Possess (When this creature dies, you may return it to the battlefield as an Aura with enchant creature
At the very least, its worth taking a lot at the set to see if we can find some sweet foil specs
Firebending is perhaps the scariest of the four mechanics