mtg game changing cards is:gamechanger · Scryfall Magic: The Gathering Search Each player shuffles the cards from their hand into their library Winds of Change (#1128) (foil)

He is great in ramp decks where he gets Mana Vault, Voltaic Key, Mana Crypt and of course lands and he is great in combo decks where he gets Lions Eye Diamond, Pyrite Spellbomb, Chromatic Star and many of the previously mentioned cards too

It might not be good against some sort of imagined enemy [that you are probably good against anyway], so it must never be good

Adding mana rocks like Mana Crypt and Mana Vault will help speed up the initial ramping turns that are needed for this deck to start copying a ton of Adventure spells and bury your opponent in value

Its cheaper, and its arguably easier to pull off without losing tempo holding mana up

Mox Amber Mox Amber rises in my esteem with each new set