Valkmira's last ability affects each spell (including Aura spells), activated ability, and triggered ability controlled by an opponent that targets you or another permanent you control
For example, there are countless different creature typal decks in Commander which generate value by going wide
This card has some notable advantages over Savant that make it a worthy new inclusion too
If the board is sploded after youve equipped this, it pops off as a creature that can opportunistically attack next turn
Meanwhile, the whole time Im smiling from ear to ear with it in my hands
If setting up lots of mana to win isnt your thing, Kess, Dissident Mage can simply win you the game on the spot by having Intuition fetch up Thassas Oracle, Demonic Consultation, and Reanimate, and its hardly the only commander with access to these kinds of shenanigans