Same with each part of a Pokemon V-UNION card
Artifact Color tag templates(None) Emerald Medallion Green spells you cast cost less to cast
Thankfully, we have a couple of other cards to (hopefully) keep us from losing to our own combo pieces in Gideon of the Trials (which can keep us from losing the game with its emblem) and Final Payment (which we can use to sacrifice Demonic Pact, and since sacrificing the enchantment is part of the cost, it allows us to get rid of our Demonic Pact even if our opponent has a counterspell, which is super helpful against control decks and some sideboard cards)
Artifact Color tag templates(None) Innocuous Researcher Parley Whenever this creature attacks, each player reveals the top card of their library
It was good in Extended when it was legal, but never broken
In a very real sense, through the rarity of Mystical Archives , Wizards has found a way to make players spend rare wildcards on commons and uncommons and mythic wildcards on rares