For example, during Oath of the Gatewatch playtesting, we used the letter K for all the "colorless-only" mana costs (since they were "Kozilek mana"), and our sticker-printing tool was picking up C as a different symbol
Promotional cards released during anniversaries or special events often reach extremely high market values today
Not only does it have a unique aesthetic, but its text is written in runes
Set symbols and rarities are a huge part of MTG nowadays
Priest of Titania is a classic mana dork that taps for green mana equal to the number of elves you control, which means that you can make a ton of mana while doing what your commander already wants you to do
Rith, Liberated Primeval Rith, Liberated Primeval gives a creature type that really desperately needs ward, and if you never attacked or blocked with Rith, you especially want the triggered ability