Doing so will often impede them from using their deck the way they built it to work and, in turn, prevent them from having fun this is especially true for Commander cards with high mana costs
For Taunting Kobold, its whenever Taunting Kobold attacks. Goad can be activated by an enter-the-battlefield (ETB) trigger, an activated ability trigger, or a state-based trigger
Phyrexia: All Will Be One has the full-art basics in Phyrexian script, and you can pull them from ONE booster products, including Draft Boosters, Set Boosters, and Collector Boosters
Mickey, Donald, and Goofy have to somehow overcome their ineptitude, band together, and save Princess Minnie and all of France from Petes dastardly scheme
This doesnt actually generate infinite mana like some Ashnod's Altar combos do, but sacrificing a creature infinitely is often all you need
Next up are two cards I could see doing a lot of work in more high powered and cEDH level games