If the enlisted creature is killed in response to the trigger, the creature with Enlist still gets the bonus based on what the enlisted creatures power was as it last existed on the battlefield
On the other hand, in three-, four-, or five-color decks, playing any non-basic land that only taps for a single color of mana is a big cost
Unlimited cards had a white border, and I know my deck was all black borders, which was a trait of both Alpha and Beta
Were passionate about the game, a little chaotic, and usually a few cards short of a full deck but we have a damn good time.
The same goes for Zuko, who starts out as mono-red but ultimately becomes red-white-black (or Mardu)