This is usually enough damage for game: just 2 2/2 creatures plus Craterhoof Behemoth (haste, remember) already adds up to 18 trample damage enough to finish off a slightly-damaged opponent
And if you sacrifice non-token creatures like Narcomoeba to Dread Return, you get a bunch of Bridge from Below tokens as a bonus
Since you'll need several creatures in your graveyard to use Mimeoplasm, Revered One effectively, there's a graveyard theme that includes mill effects and reanimation , including a couple ways to play lands from your graveyard
Getting a free ping in as well is a lovely kicker
The Filigree Sylex handles early-game pressure well, can get you out of trouble in a pinch later, and acts as a win condition if unneeded
In the past, uncommon MTG cards making massive competitive strides was strange