sting mtg card Xira, the Golden When Gatha fell Sting, Elven Long Knife (18R113)

Wildcards in MTG Arena are digital objects you can trade in or craft for any available card of the same rarity

You gain 4 life if an opponent has more life than you

This one is the least obvious of the joke cards in this set

Then theres just attacking for the sacrifice in order draw cards with those creatures which have done their work, like Noxious Gearhulk

The First Sliver is a great choice, but getting more eyeless pretties onto the battlefield isn't helpful if they all die in a Fumigate

This also means that rather than trying to design a legendary creature of your own making, Id suggest trying to find an existing character from Magic or outside of it that you can lean into to draw the flavor from