I like doing these cards, however, because I have a set subject and a set criteria
Luminous Swirl is a bit more luck-based with an initial 80 damage and 40 more for each head you land on while flipping the coins
In situations when you have very few cards in your hand (even if its one) and your opponent has a good number (the more the merrier), run Copycat to put your card(s) back into your deck, and draw as many cards into your hand
Earthquake has the same buylist price as Telepathy but is $10 cheaper retail and even though there are a jillion foil quakes, theres only one 7th
This is, for example, why you occasionally see a card like Fugitive Wizard in an expert expansion
Blood Artist and Mayhem Devil are two of the most prominent examples since they become win conditions