If its mana value is 4 or greater, seek a creature card
Tribute 1 other Xyz Monster, and if you do, negate the effects of all other face-up cards currently on the field until the end of this turn
Just as with Grim Flowering, the number of draws you need to perform is defined at the beginning of resolution
Adding in a Ledger Shredder will help fill your graveyard up quickly, thanks to its connive ability, triggering fairly frequently as you have three other players to potentially cast two spells in a turn, giving you three discards before your next turn
Ruhan of the Fomori is perhaps the most straight-forward of these, rushing headlong into battle each turn, but never sure against whom
I have spent days poring over the spoilers for Strixhaven