The triggered ability of the "partner with" keyword still triggers in a Commander game
Every Adventures in the Forgotten Realms Collector Booster contains 15 Magic: The Gathering cards and 1 traditional foil double-sided token, with a combination of 5 Rares and/or Mythic Rares, 25 Uncommons, 47 Commons, and 1 Land card
Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .) Tragic Banshee Rarity: Uncommon TYPE: Creature SUBTYPE: Spirit CMC: 5 Mana cost: USD: $0.13 EUR: 0.05 TIX: 0.03 EDHREC RANK: 19776 (5/3) Morbid When this creature enters, target creature an opponent controls gets -1/-1 until end of turn
I think its the right call though, because Anhelos design really sets him up as a fantastic commander choice at any level of play
(2024-06-07) Once you begin to cast a spell using an emerge ability granted by Herigast, losing control of Herigast won't affect it