mtg cephalid cards A to Z 2016 : COLISEUM — The Cryton Chronicles Activate this ability only if seven or more cards are in your graveyard. Cephalid Snitch [Torment]

2021-02-05 A creature has been dealt excess damage if one or more sources deal more damage to it than the minimum amount of damage required to be lethal damage

While paying 5 mana to get a 3/2 body with lifelink at flash speed while also removing a key threat isnt always bad, the ability to evoke this creature is what really makes it shine

Sandman's first ability works in all zones, not only the battlefield

The only reason she isn't the most expensive is that there are Iconic cards in the set

Basically the flipping into a walker adds sufficient value to the 2/2 body that it is something that will draw removal

This is an extra little bonus and means each deck has four legendary foils instead of just three