You cannot have a creature simultaneously go to the graveyard and into your hand, so the outcome depends on the timing of the spells
Of all of the Praetors you could hope to stick for a complete rotation around the table at Commander night, this is the one you want
You can get some thematic ones, like Gyre Sage in +1/+1 counter decks, but the combination of any color and hexproof makes this a reliable dork for any deck
When you cast this spell, you gain control of target opponent during that players next turn
This also makes multiple copies of these cards work out well, since you can cast your first copy on Turn 2, and then on Turn 3 cast the second and double-spell trigger both with a one-drop
The way the Vault is sitting on a podium, protected by a gilt fence as the public mill around and marvel at it, feels spot-on for the series