For the last example, lets look at more of a format staple, something that saw play in a range of archetypes, The Wandering Emperor: TWE is only in 18k Commander decks, and while shes a player in some Pioneer decks, that hasnt kept her price high
Wilds Unknown ushers us into whole new domains, with new abilities, incredible art, and tantalizing story hints
Building a Limited Environment The structure for Draft and Sealed in Magic: The Gathering FINAL FANTASY was based on each color having a major focus
As you can imagine, blocking creatures with first strike is very difficult unless you have a creature that either has first strike itself or has enough power to tank the damage
Put a +1/+1 counter on it if the exiled card's mana value is 4 or greater
Bribery Bribery was one of the earliest boogeymen in EDH, before it became Commander