The original ruling said that tapping creatures allowed you to reduce the cost of the spell you were casting
These cards are often found in Azorius (white and blue), and Esper (white, blue, and black) libraries as part of the infamous Stax deck, which aims to slow the game to a crawl, and winning by making everyone lose
Generally speaking, though, I opt for other cards first
Overseer of Vault 76's last ability lets you choose to remove exactly three quest counters from among permanents you control when it resolves
It really depends on what you consider unique. For this article, lets define a unique Pokmon card as one that is visually distinct meaning it has different artwork, holo patterns, or card layouts
RESTING BEFORE THE HORIZON I apologize for the long list, but this set might live up to the meme of Commander Horizons