After hold ’em, the Spike duo and the friends they called go back to the castle to play ogres and oubliettes.

Spiegel: Thanks for the light, by the way.
 
Spike: Turned off the mail flame in order to do it. So, how the heck did you end up here?
 
Spiegel: It involved settling a score with someone from my past. And…personally, I thought I was dreaming when Faye and Jet told me about this place when I woke up.
 
Spike: Ouch. Who was he?
 
Spiegel: He was known as Vicious. Red Dragon Syndicate member…and who I used to be friends with.
 
Spike: (cringes) And I take it he’s dead?
 
Spiegel: And took the Syndicate with him to his grave. On the bright side, at least I won’t be mistaken as him anymore. Less of a hassle that way, and I won’t have to give them any pain.

I get it.

one’s a purple dragon, the other’s a former Red Dragon

So, eventually, the entire cigarette ends up in the hooves of Celestia, who would then ‘smoke’ it with her green fire, ‘sending’ it back to the Spikes, who then ‘smokes’ it again…
 
INFINITE CIGARETTES!