After the exchange, talk to Mai, and agree to duel Magnum
Later MTG lore would have some fun with this, handwaving that, no, the Segovian Leviathan is the largest leviathan in its home plane of Segovia
But where this goblin assassin really shines is in infinite sacrifice combos that deal infinite damage to a player
Thankfully, it seems that Wizards has mostly learned from these mistakes and has been much more cautious about printing mechanics like partner and Eminence that mess with the command zone since 2018
On top of fair applications, Dreadhorde Arcanist is ready to cast those same Time Spiral spells that everyone fears will eventually tear Modern in half
Adding a good amount of extra graveyard recursion to a Sedris deck is a smart choice