Chaos is an ancient demon who sent the fiends into the present with the primary purpose of sending Garland back into the past where he can then become Chaos
Where prices really spike is when cards appeal to both groups, with a card like Sheoldred, The Apocalypse a prime example being a major player in multiple competitive formats, and a favourite in Commander
If you think that a card might be worth more in the future, consider holding on to it
Some players may even choose to build multiple decks out of their pool and switch entire decks between games depending on the match-up
When I roll a d20, I can get any number from 1-20, and Ill get the average by calculating min + max / 2, so (1+20)/2 = 10.5
And somewhere on Redbubble, theres a Kylie Minogue greeting card thats unique in the perfect way for you both, created and sold by an independent artist who shares your quirks