Dark Confidant Cecil, Dark Knight Dark Confidant was embraced as a reliable draw engine for decks with low average mana costs, particularly in the sideboards of Golgari Roots and main decks of Orzhov Pixie
Esper Sentinel, Imperial Recruiter in Human decks Esper Sentinel punishes any deck looking to interact and is best supported by disruptive creatures to leverage the additional cards you may draw, making Humans the perfect home for Esper Sentinel
The downsides of Calamitys Wake are that its useless against creature-based strategies and it also exiles the graveyard of the person who cast it
When you mutate it, if you mutate on top of the token, you will be able to make another token as it will no longer fall under the legendary rule
This means he is a perfect weapon against some of the bigger enemy cards on the table, and at only two ink cost, it would be pretty easy to play