Sheoldred, Whispering One Strixhaven Attacking creatures you control have

Attacking creatures you control have double strike

You may reveal a creature card with mana value less than or equal to the number of lands you control from among them and put it onto the battlefield

Then if this is the second time this ability has resolved this turn

reveal Nexus of Fate and shuffle it into its owner's library instead

Sheoldred, Whispering One Strixhaven Attacking creatures you control haveSwampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature of their choice.