It's seen wide play across many MTG formats, and it was considered so powerful that the Commander rules committee briefly had it on ban watch
, , Put a page counter on this artifact: Draw a card
Set: Commander 2018 Sealed Release Date: 2018-02-14
But it's also true that people can use Encroaching Mycosynth to make the battle an artifact, then The Blackstaff of Waterdeep to make it a creature, then Arcane Adaptation to make it a Human, then Moonmist to transform it, and because of the changes to DFC token rules introduced for Incubator tokens, that token would then transform
Like another card, Soul Spike, that spiked not so very long ago, Sickening Shoal is seeing play in Necrodominance decks
Aristocrats is the obvious go-to here, but any deck with a lot of creatures and love of death triggers can make it work