The reality is, if you want to just get three permanents onto the battlefield for a flashy finish, you don't have to spend 7 mana to do it
A vision of Gix informed by the past: From our prediction article: expecting abilities that reference his earlier cards such as Claws of Gix and Ring of Gix very unlikely he would be mono-color Phyrexian praetor expecting him to be Dimir based might even have the demon creature type as well Exxaxl: Wow
I think Dormant Sliver is awesome because you could, in theory, side it in against Sliver decks, play it and laugh maniacally as their tribal synergies amount to nothing because their Slivers cant attack because all Slivers have defender
A solid recommendation is to toss at least one counter on Siege Veteran itself to help it dodge at least some removal, like Cut Down
The caveat to this is with the daybound and nightbound mechanic from Midnight Hunt, where cards enter as the appropriate side based on whether its currently Day or Night