Look for these signs that a card is promotional
If the Pokmon Company is unable to continue creating relevant products that capture societal attention in the future, demand for cards could conceivably fall
If you tap a vampire you control to kick this sorcery, you then gain that much life
And while I certainly wouldn't go to lengths of employing cards of Chimney Imp's caliber in your deck, keep in mind that once a creature is on the table its cost has been paid and now you should evaluate it for what it is
For that reason, a bunch of my Vampires have lifelink, and I opted for Radiant Destiny to give my board Vigilance, over some other Lord effects
If damage would be dealt to Bloatfly Swarm while it has a +1/+1 counter on it, prevent that damage, remove that many +1/+1 counters from it, then give each player a rad counter for each +1/+1 counter removed this way