With an As ForetoldAs Foretold already in play, we don't mind casting TiamatTiamat in the main phase, but otherwise, flash is usually the best way to go
Finally, Dredge might also side in Abrupt Decay or Leyline of Sanctity for protection from dedicated Burn decks, though getting it in the opening hand is essential.
Steels damage abilities make the banish choice highly valuable against Tamatoa and Mufasa in Sapphire, tricky Evasive or Bodyguard characters, or anything you just need gone
Lila, Hospitality Hostess from Unfinity has plenty of common sense, but rarity-matters isnt something you want floating around black-border games
Get Lost A few removal spells next
You can return your own creatures to your hand and then cast them for their mutate cost if you've got the right recursion effects