In deck builds focusing on enters the battlefield triggers, like Spyglass Siren or Three Steps Ahead tokens, this card lets you re-buy your best effects while digging deeper into your deck
My following comments are speculation, but: The card designs could have been approved around the same time period as the first wave of 1996 cards, the contract could have enforced the release date of 1997 to stagger product hitting the market, the contract could have stipulated mew was to be withheld until approved, or indefinitely, or permission triggered by some other event such as a sales target
Wilds of Eldraine gave us two new precons, Fae Dominion ( Faeries ) and Virtue and Valor ( Enchantments )
Casting Cost: Card Type: Creature - Human Warrior Power / Toughness: 1 / 1 Card Text: Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.) Creatures with power less than Skarrgan Pit-Skulk's power can't block it
Removal spells like Murder are the quintessential example of a one-for-one: You burn one card from your hand to destroy an opponents creature