Betor, Kin to All may not be the most popular Abzan Commander, but few Legendary Creatures in the wedge can threaten to cut everyone's life totals in half with a single trigger while presenting lethal amounts of power on board
Mirri, Weatherlight Duelist (one of the best Cats for Commander) delivers this effect only if she's attacking and/or tapped, and the four-mana 1/5 Construct artifact creature Silent Arbiter is a straight-up reprint of Dueling Grounds in creature form
701.25d: An ability that triggers whenever a player surveils triggers after the process described in rule 701.25a is complete, even if some or all of those actions were impossible.
And getting absolutely nothing from an entire card feels personally less satisfying than being punishedYusri always provides something when you alter the game state, and one bad flip is more than worth one good flip
"Look, I drafted Human control!" "Wow, UR Wizards can be really good when the right enablers show up." I've been down the incidental tribal road before