You can only use this effect of "Dyna, Hero Fur Hire" once per turn
Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent of their choice or discards a card
Whether through traditional mana rocks like Sol Ring and Arcane Signet, versatile options like Fellwar Stone, or powerful artifacts like Mana Crypt and Gilded Lotus, including staple mana ramp cards in your Commander deck can significantly enhance its consistency and performance
Considering its now-disregarded history, Greninja has some of the coolest lore of any Kalos Pokemon
It does require a lot of resources, both in terms of mana and setup, so Id mostly leave this for Constructed
If the line isn't dead center and is more at the top or bottom, that can also sway the grader opinion