Menace
Whenever a creature you control attacks alone, put a +1/+1 counter on it. Then surveil X, where X is the number of counters on it. (Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
$5.99 $3.59
$67.00 $33.50
$13.00 $8.00
$12.00 $8.00
$13.00 $9.00
$21.00 $12.60
$22.00 $13.20
$99.00 $49.50