mtg forgotten realms draft booster box Magic the Gathering: Midnight Hunt - 10 Common cards Adventures in the Forgotten Realms

Thats one way to either further damage your opponent or slow down their Mana use

Just watch out for certain Exile spells like Swords to Plowshares or Vraskas Contempt that would make recasting Optimus more expensive (the Commander tax applies to both sides), or other annoying blue cards like Capture Sphere that doesnt kill him but does prevent attacking and blocking

Better than that

If you lack enough creatures with the proper creature type, you can utilize changelings like Irregular Cohort to get the card draw trigger

Think of Giant Sarevok as a sort of supercharged The Rack of sorts

Then resolve the Guide of Souls trigger first, and have the Shrieking Drake bounce itself to your hand