The reflexive triggered ability will trigger any time you lose control of that Equipment this turn, whether it's because the "until end of turn" duration ended or because someone else gained control of the Equipment with another effect
Pride Sovereign may be the least of these, but it still isnt bad
Sarulf, Realm Eaters ultimately a really fun commander to build and play around, making it a good combo of fun and strong
You dont have to invest any cards, just keep the ability open, until you want to play your Demon Beast later
God-Eternal Oketra All the God-Eternals are busted in their own right (except maybe God-Eternal Rhonas)
If you have Silas Renn, Seeker Adept in the command zone and Slurrk, All-Ingesting has already been sent back to the command zone once, Silas Renn would not cost more to cast, while Slurrk would