Loxi: I do really enjoy effects that let you copy things on either side of the board - the added flexibility will help this find a slot in copycat decks
It can be any doctors companion, which is this sets partner, and since you can choose its color, its a free color to a given doctors EDH deck
The only way to get it is to be lucky from a random event on the map
You've then also got the fact that it's both a creature and an equipment, which means there are more ways to fetch it up in those formats too
It had some minor other notes to play, such as being part of the theoretical Extended Yawgmoth's Bargain deck I was asked to build to show how often it could kill on turn one, and providing the method of execution in some other cases, but Cadaverous Bloom is all about the Prosperous Bloom deck
Locke Cole can draw fresh cards while discarding spare cards