Hes been subject to a massive nerf that has increased his Ink cost, removed his Ward keyword, and altered his ability so that players must Shift Floodborn characters to trigger his discard
For instance, Absolute Virtue was a FFXI boss that was not intended to be killable
(While paying a waterbend cost, you can tap your artifacts and creatures to help
There are some pretty sweet creatures to bring back to life in here too, like Ashen Rider, Doom Whisperer, and Toxrill, the Corrosive
Despite Grixis Shadow being currently maybe the strongest deck in the format (thanks to Lurrus obviously) I think Deaths Shadow is not the correct way how you want to approach your tempo deck in the future
2 Lifegain Lifegain is a fantastic strategy in Golgari, especially with it being the primary focus of the color in the release of Strixhaven which gives Golari a ton of toys to boost up the strategy to its Selesnya counterpart