Because they cost relatively little compared to their size and flying impact, these cards would often vanquish opponents without ever being blocked
sharks are a less popular creature type than humans so it follows that itll have less targets for its activated ability, but it's still a pinger for whenever you cycle or discard a card
Thats going to mess with a whole bunch of the meta, even if playing Fighting is still going to be boring as hell
That said, not everyone is happy
Once youve paid the four mana to activate the Dens ability, it becomes a Legion Warboss-esque creature that generates an attacking 1/1 Goblin when it attacks, making it a very powerful mana-sink for aggressive red decks and a possible win condition for control decks
Halo Forager is one of the rogues you might run to reuse some spells from your graveyard, but throwing in some red or blue wizards can get you some spell copying