Some decks, for instance, do not want to play the actual card Counterspell at all
Morophon has the added bonus of being an anthem for all others of the creature tribe you declare as he's cast, giving them +1+1
Each Play Booster contains 14 Magic: The Gathering cards and 1 Token or Art card, including 14 cards of rarity Rare or higher and 35 Uncommon, 69 Common, and 1 Land cards
This means that by suiting up Wyleth with efficient Auras and Equipment cards, its controller can reliably keep refilling their hand each turn.
However, weirdly enough, its also sometimes the best card against soft graveyard hate like Relic of Progenitus and Soul-Guide Lantern, as you can quickly rebuild a graveyard to fuel a Murktide Regent if your opponent has exiled your graveyard earlier in the game