It is one of the most powerful Commons ever printed, as evidenced by how heavily its been played in Pauper since the format was born
If you cast two spells in a turn, youll copy the second one and suspend it, so you get only the copy for the time being
Examples are Battle of Wits (which requires a huge library to win the game) and Scapeshift (which requires playing enough Mountains to one-shot your opponent with Valakut triggers)
Drawing Cards Usually the downside to drawing cards in black is the death of one of your creatures, or more frequently, a small loss of life
There is some variance in shape, but it's pretty obvious that it is supposed to be a triangle, full circle, or even an acorn
The short of it is that they can steal a card for you